Certified Members

NALMS Certified Lake Managers (CLMs) manage lakes, ponds, reservoirs and other bodies of water. CLMs make decisions that affect the quality and use of these water bodies. NALMS Certified Lake Professionals (CLPs), on the other hand, provide vital data used to make decisions that affect the quality and use of a water body. Our certified members are leaders in their fields who have reached the very pinnacle of professional development in lake management; their depth of knowledge is unparalleled.

This listing of our active certified members – both managers and professionals – is sorted alphabetically by state or province.

Click the letter of the state or province you’d like to search below:

A     B     C     D     F     G     H     I     M     N     O     P     R     S     T     V     W


Rick Amalfi, CLM
Aquatic Consulting & Testing, Inc.


Reed Green, CLP
Hydrologist (Limnologist)
U.S. Geological Survey

Reed Green has been a member of NALMS since 1987. He has been with the USGS Arkansas Water Science Center since 1989 as Hydrologist (Limnologist) conducting a variety of reservoir and watershed studies. He holds a B.S. and M.S. in Botany (1982 and 1985, respectively) and a Ph.D. in Biology (Limnology, 1998) from the University of Arkansas. Reed’s project work with the USGS deals mostly with watershed hydrology and reservoir limnology and he has authored or co-authored over 35 USGS or USACE reports, journal papers, etc. Reed is an adjunct faculty member at the U of A in Little Rock mentoring undergraduate and graduate students and is a part-time instructor for special-topic courses such as Phytoplankton Ecology, Phytoplankton Identification and Use as Bioindicators, and currently, teaches General Botany. When Reed is not on the softball field, coaching youth baseball or basketball, in the vegetable garden, teaching night classes at the local university, or leading a men’s class on Sunday morning, you can find him on his fishing kayak recording Secchi disk depths and depth profiles, mapping lake-bottom features and vegetation, while sampling native centrarchids using a variety of single-seine necton samplers.

Brad Hufhines, CLM
Beaver Water District

Bradley Hufhines has 14 years of experience in the water resources field and has been a member of NALMS since 2008. Brad’s formal education includes a Bachelor of Science in Animal Science and Master’s of Science in Environmental Science degrees from the University of Arkansas. Brad is employed at Beaver Water District, the second largest drinking water provider in Arkansas. Beaver Lake, Beaver Water District’s source of raw water, is a multi-purpose reservoir in Northwest Arkansas and is the source of drinking water for over 420,000 Arkansans. Brad blends research, community outreach and education, and project management at Beaver Water District for the protection and monitoring of Beaver Lake. Besides being a CLM, Brad holds Wastewater Treatment, Industrial Wastewater Treatment, Water Treatment, and Water Distribution licenses. Some of Brad’s projects include the Northwest Arkansas Rain Garden Project, tall grass prairie restoration, net-nutrient retention study, and watershed-wide bioassessments. Brad is an outdoorsman who feels blessed to be in a career that serves others and helps to protect natural resources.


British Columbia

Jesse Montgomery, CLM
Metro Vancouver

Jesse is a biologist working in operations including water supply reservoirs for Metro Vancouver.






James Bellis, CLM
Big Bear Municipal Water District

James Bellis began his education at California State Polytechnic University, where he received a Bachelor of Science in Urban and Regional Planning and a Master of Science in Regenerative Studies and Sustainable Design. James also received an ESRI Certification in Geographic Information Systems from San Bernardino Valley College. Growing up in Lake Arrowhead, camping throughout the Western US, and surfing all over the west coast contributed to his love and respect of water at an early age. He is fluent in Spanish and is an avid snow skier. However, he usually dedicates most of his free time to playing in numerous bands. James studied electric bass under the instruction of Tom Fowler (Frank Zappa, Ray Charles). James’ previous employment included the City of Rialto Development Services Department and the Arrowhead Lake Association Lake Management Department. Currently, James is the Lake Manager at the Big Bear Municipal Water District in Big Bear Lake, CA.

Tyler Fowler, CLM
Waterworks Industries, Inc.

Tyler is currently the Regulatory Compliance Manager at Waterworks Industries Inc. located in Windsor, CA. He earned an undergraduate degree in Environmental Studies at San Francisco State University in 2005 with a minor in Geography. Tyler entered the field of Lake Management in 2007 and has been managing lake, reservoir and lagoon systems for twelve years. Tyler specializes in developing and implementing lake and lagoon management programs as well as providing regulatory compliance and permitting for various private clients and municipalities throughout the Western United States. Tyler is also a licensed applicator in California, Nevada and Oregon.

Seyoum Yami Gebremariam, CLM
Metropolitan Water District of Southern California
seyoumyg@gmail.com / 909-392-5124

Dr. Seyoum Gebremariam is a Principal Limnologist at Metropolitan Water District of Southern California (MWDSC). He earned a BS degree in Physics from Addis Ababa University, Ethiopia. He also has MS degree in Environmental Science from the University of Idaho, MS degree in Environmental Engineering as well as Ph.D. in Civil Engineering from Washington State University. He specializes in watershed and water quality management in lake and reservoirs, development of hydrodynamic and water quality models as well as the use of remote sensing data for monitoring water quality in lakes and reservoirs.

Alex Horne, CLP

Eli Kersh, CLM
e limnology, Inc.

Eli spent many years working in and traveling to remote wilderness areas as a fishing or kayaking guide. Through these and other experiences he developed knowledge and skills that led him to seek an academic path geared towards the Outdoors. He received his undergraduate degree from UC Santa Barbara in 2007 where he majored in Geography. After several years working as an independent GIS analyst for Fire & Police Departments, Indian Tribes, and other agencies, he returned to school in 2011 to obtain a masters degree in Geography with an emphasis in Lake Management. Combing his education, skills, and experiences, he is now the Environmental Service Manager at a professional lake management company in the San Francisco Bay Area and works as a private consultant providing training and education to private and government groups throughout California.

Stephen McCord, CLP
McCord Environmental, Inc.
sam@mccenv.com / 530-220-3165

STEPHEN MCCORD, Ph.D., P.E., is President of McCord Environmental, Inc. He holds a B.S. degree in Civil Engineering from Clemson University, and an M.S. and Ph.D. degrees in Civil & Environmental Engineering from the University of California Davis. As a registered Professional Engineer in the State of California, Dr. McCord has over 20 years of consulting, research and teaching experience in the environmental engineering field with projects throughout California, several other US states, and internationally. He has managed water quality field studies and improvement projects in rivers, lakes, wetlands, deltas, and bays throughout California. He is past President of the California Lake Management Society and works on lakes to address mercury bioaccumulation, eutrophication and drinking water quality concerns.

Terry McNabb, CLM

Terry McNabb is a graduate of Michigan State University with a degree in Water Resource Management and operates Aquatechnex, LLC.  Aquatechnex LLC is a full service lake and aquatic plant management firm that operates from offices in California, Oregon, Washington, Idaho and Montana. The firm has a recognized expertise in the restoration of lake and river systems impacted by invasive aquatic weeds and management of Harmful Algae Blooms. Terry has been involved in lake management for over 40 years. He is a past president of the Aquatic Plant Management Society, the North American Lake Management Society and the Western Aquatic Plant Management Society. He is a recipient of the US Asia Environmental Partnership grant to work with lake restoration activities in Malaysia and Indonesia. He is a cooperator with the US Army Corps of Engineers Aquatic Plant Control Research Program and an instructor for the University of California-Davis Aquatic Weed School. 

Patrick Simmsgeiger, CLM
Diversified Waterscapes

Founder and President of DWI, Patrick is a Licensed Aquatic Pesticide Applicator, Landscape Contractor and a NALMS Certified Lake Manager since 1999. He is one of the few individuals in the industry that is an expert in all stages of aquatic treatment, from product development and manufacturing to application and treatment with over 40 years of experience throughout California, the US, and internationally.

He specializes in watershed and water quality management in lakes and reservoirs. Patrick is the only applicator that also manufactures an EPA-registered chelated copper algaecide, that is 100% natural and organic, which has been around since the 1970’s. He also manufactures a patented clarifier that has been used successfully nationwide to clear notoriously stubborn water bodies.

Patrick is well known on the speaking circuit with over 100 presentations nationwide, recently having given a presentation at the I.C.A.I.S Conference in Fort Lauderdale and at the California Lake Management Society’s annual Conference in Big Bear, CA.



John Aronson, CLM
AATA International, Inc.

B.S. in Biological Sciences with highest distinction from Nebraska Wesleyan University.  M.S. Zoology/Limnology/Minor Civil Engineering, University of Nebraska-Lincoln.  Postgraduate studies Colorado State University. Senior Ecologist, Ecology Consultants, Inc.; Sr. Aquatic Scientist and Laboratory Director, Environmental Research and Technology, Inc.; Founder and President, Riverside Technology, Inc.; Founder and Director, Aquatic BioSystems, Inc.; Founder and President, Advanced Aquatic Technology Associates, Inc., AATA International, Inc.

John is the author of “Watershed Management in Russia and the Former Soviet Union” IN Reimold, Robert. 1998. McGraw-Hill.  He completed 54 major projects in Russia, Kazakhstan, and the FSU over the past 24 years.  Besides his NALMS membership, John has been an active member of the American Society of Limnology and Oceanography,  North American Diatom Symposium and many other societies.  He created an advanced phycology lab for analysis of diatoms and other phytoplankton and periphyton, and taught Scanning Electron Microscopy at Colorado State University, where he completed post-graduate training in environmental engineering, statistics, and natural sciences.  He is polite in 7 languages and has traveled extensively in nearly 50 countries worldwide.  When asked about his most memorable limnological experience, John indicates that it was seeing Lake Baikal for the first time, (and every time thereafter) on his many trips to Buryatia, Russian Far East.  He has a long history of investigation with the problem diatom, Didymosphenia geminata, which he has studied from Colorado and Russian Federation.

Kelly Cline, CLP
City of Westminster

Trea Nance, CLP
Hydros Consulting Inc.

Trea received her B.S. in Wildlife Ecology and Conservation from the University of Nevada, Reno (2012), where she studied benthic invertebrates in Lake Tahoe.  She received her M.S. in Natural Resources (emphasis: Limnology), from the University of Idaho (2015). Her Master’s Thesis research involved calculating a phosphorus and sediment mass balance for Fernan Lake, a small lake suffering from frequent harmful algal blooms. Throughout her graduate research, she had the opportunity to work closely with landowners, educating them about limnology and gaining insights into the history of Fernan Lake. This led to a passion for public education and presenting data to the public. She is active in the NALMS affiliate, CLRMA (Colorado Lake and Reservoir Management Association), where she serves as Treasurer.

James Shelley, CLP
City of Boulder

Clayton Weese, CLM
Water Resource Specialist
Ute Water Conservancy District

Clayton Weese graduated from Mesa State College with a Bachelor of Science degree in Biology.  He is currently a State of Colorado Certified Class A Water Operator and NALMS Certified Lake Manager.  Clayton has worked in the drinking water industry for almost 18 years now and has held the positions of Water Treatment Plant Operator, Water Quality Analyst, and currently is the Water Resource Specialist for Ute Water Conservancy District in Grand Junction, CO.  In his current position, Clayton samples and manages 23 reservoirs on the Grand Mesa.



Luke Gervase, P-CLM
The Pond and Lake Connection

Luke Gervase has been an Aquatic Biologist for The Pond and Lake Connection in Brookfield, CT since May 2016. He is a graduate of SUNY ESF (B.S. in aquatics and fisheries science with a minor in marine ecology) and SUNY Oneonta (M.S. in lake management). His master’s thesis and research were focused on writing a comprehensive lake management plan for the Millsite Lake Property Owners Association in Redwood, NY; writing is still in progress. Luke is a licensed aquatic pesticide applicator in Connecticut, New Jersey, and New York.

Seth Jones, CLP
Aquarion Water Company of CT

Seth holds a B.S. in Biology with an Aquatic concentration from Southern Connecticut State University. During college, he worked seasonal positions with the Connecticut Agricultural Experiment Station on their mosquito project, CTDEEP Parks Department at Sherwood Island State Park and CTDEEP Marine Fisheries division, in their Anadromous Fish Program. He was also a part-time Ranger and Wildlife Rehabilitator at Ansonia Nature and Recreation Center. He has over 16 years experience at Aquarion Water Company, a public water utility, in various positions of increasing responsibility from Water Quality Field Technician to Supervisor of Water Quality Field Operations. His duties include water quality sampling and testing, plankton analysis and reservoir management.

Mark June-Wells, CLM
Aquatic Ecosystem Research

Mark obtained his B.S. from Southern Connecticut State University in 2003 and his M.S. from Rutgers University in 2005. In 2010 he completed his Ph.D. in plant community ecology and joined the Connecticut Agricultural Experiment Station’s Invasive Aquatic Plant Program as a post-doctoral scientist. He currently owns Aquatic Ecosystem Research, a freshwater conservation company founded in Connecticut. Additionally, Mark is a NALMS Certified Lake Manager and an ESA Certified Ecologist with OSHA 10, HAZWOPER 24, and CT-state pesticide licenses.



Hillary Kenyon, CLM
Northeast Aquatic Research, LLC

Hillary holds a B.S. in Environmental Science from the University of Connecticut and works as a lake manager for Northeast Aquatic Research, a limnological consulting company that studies lakes in New England and New York. She is committed to interdisciplinary research to better manage widespread lake problems related to aquatic invasive species, internal nutrient loading, onsite wastewater treatment, and stormwater. 




Larry Marsicano, CLM
Aquatic Ecosystem Research

Larry obtained his B.A. from Western Connecticut State University in 1988 and his M.A. from Connecticut College in 1993. He managed the Freshwater Ecology Laboratory at Connecticut College for Dr. Peter Siver from 1990 to 1997 which specialized in paleolimnology and regional lake water quality studies. Publications can be viewed at the Silica Secchi Disk website. In 1998 he was hired by the Candlewood Lake Authority and in 2003 became the Executive Director of that public lake management agency on the largest lake in Connecticut.

In 2017 Larry became a Principal Partner at Aquatic Ecosystem Research, LLC. More recent publications he co-authored in the Journal of Lake and Reservoir Management include A laboratory examination of the effectiveness of a winter seasonal lake drawdown to control invasive Eurasian watermilfoil (Myriophyllum spicatum) (2014, 30: 381–392) and Assessment of long-term trends for management of Candlewood Lake, Connecticut, USA (2017, 33: 280-300).

Christopher Mayne, CLM
GZA GeoEnvironmental, Inc.

Chris has over 20 years experience working on lakes, ponds, and reservoirs.  He has worked on various lakes and reservoirs across the country.  He has performed water quality assessments to aid in the protection of source water and to develop restoration strategies for both recreational lakes and drinking water reservoirs.  His work has included in-situ profiling, water chemistry analysis, zooplankton community analysis, algal community analysis, macrophyte identification and mapping, fish community assessments, and GIS evaluations of surrounding watersheds.  He also has assisted lake and reservoir managers address issues associated with algal blooms and invasive aquatic plants.  Chris owned and operated a pond management company for nine years. 

Currently,  Chris is working with GZA GeoEnvironmental as a Project Manager working in both the Ecology Division providing lake and watershed management assistance and in the EHS Compliance Division where he works with industrial, utility, institutional, municipal, and construction sectors with their compliance needs including stormwater and wastewater discharges.

Chris has been a Certified Lake Manager since 2003 and is a NALMS member.  He has also been a long standing board member of the Connecticut Federation of Lakes.



Bruce Richards, CLM


Michael Chimney, CLP
South Florida Water Management District

Amy Giannotti, CLM
City of Winter Park

Amy L. Giannotti serves as the Lakes Division Manager for the City of Winter Park (FL) and is the owner of AquaSTEM Consulting, LLC.  Amy holds a B.S. in biology from Marietta College (OH) and earned her M.S. in environmental science at the University of Virginia.  Her current work examines the survival and spread of invasive plant species in freshwater habitats, and specifically considers the effect of urbanization on native plant restoration efforts and water quality.  In addition, Amy is an advisor to the University of Florida’s Center for Aquatic and Invasive Plants and has designed curriculum programs for elementary, middle, and high school students highlighting the impacts that exotic plants have on our waterways. Amy also serves as president of the Cambrian Foundation, a 501c3 not-for-profit organization based in Orlando (FL) that specializes in technical and scientific diving. During her career with the Cambrian Foundation and in conjunction with the Foundation’s research expeditions in Florida, Mexico, and Bermuda, she has initiated many educational and outreach programs, including a variety of projects related to the preservation of cave, karst, and groundwater systems in these regions.

Patrick Goodwin, CLM
Aquatic Systems Inc.

Patrick is a research scientist for Aquatic Systems Inc., a Florida based lake management company with 11 offices throughout the state. There he conducts research projects that investigate urban lake ecology, with a focus on the use of sustainable management techniques as tools for restoring impaired lakes and ponds. He also works for Vertex Water Features Inc., an international aeration company that designs and manufactures aeration systems for various sized waterbodies. Working through Vertex’s international dealer network, Patrick designs research projects to improve our understanding of aeration throughout different ecoregions.

Patrick has a B.S. from the University of North Florida in biology and is where his interest in freshwater ecology began. There he researched 42 ponds within UNF campus looking at the effects of reclaimed wastewater back into the environment. He was also part of UNF bass fishing club. Patrick is in the process of finishing his M.S. at the State University of New York, Oneonta, where he studied Lake Management. His applied M.S. thesis investigated the physical and ecological aspects of two NY lakes such that a comprehensive lake management plan could be designed. Patrick is an active member of the Florida Lake Management Society (FLMS) and has served on the board. He enjoys teaching and being outdoors, especially fishing, hunting, and surfing. 

Mark V. Hoyer, CLM
University of Florida
mvhoyer@ufl.edu / 352 215-0338

Historically (> 35 years), Mark Hoyer’s primary interests lay in defining the relations among nutrients and the ecology of Florida streams, lakes and estuaries. These research interests include algal abundances, aquatic plant, fish and aquatic bird communities. For the same time frame, Mark has worked with Citizen Scientists (Florida LAKEWATCH) both educating them on the functioning of aquatic systems and using them in the collection of data for his research interests. Mark’s current focus is on examining long-term trends in water chemistry of aquatic systems and determining if any significant trends are related to anthropogenic impacts (e.g., land use changes) or long-term climatic cycles related to the Atlantic Multidecadal Oscillation in temperature.

Lance Lumbard, CLP

Marson Nance, CLM
Orange County Environmental Protection Division
Lake Management Section

Marson Nance is a Senior Environmental Specialist and Lake Manager for Orange County, Florida.  Marson has served as an environmental biologist on projects for governments and private-sector clients throughout Florida and the Desert Southwest.  Marson currently manages over 2,000 surface acres of water in the Orlando area and manages lake taxing districts to promote, improve, and protect habitat and water quality within Orange County.


Sam Sardes, CLP
Aquatic Systems Inc.

Sam Sardes received her B.S. from Florida Atlantic University and her M.S. from the University of Florida. The focus of her research has been on aquatic plant and algae management with a primary goal of integration of control methods for more efficient management programs. She has been with Aquatic Systems since 2016 and is currently their weed science director. Her research focuses on plant and algae management along with lake restoration and nutrient mitigation. Her master’s research focused on the interactions of IPM tools (herbicides and biocontrol agents) for management of water hyacinth. She has been a licensed aquatics and demo/research applicator since 2013.



Anthony Dodd, CLM
Environmental Specialist
Georgia Power

AFS Certified Fisheries Professional Past Secretary, Georgia Lake Society Board Member at Large, Georgia Lake Society Advisory Board, Georgia EPD Georgia Adopt-a-Stream Program

James Lanier, CLM
Aquascape Environmental

Jason Yarbrough, CLP
Tennessee Valley Authority


Jason earned his BS in Fisheries Management from Auburn University (1997) and his MS in Fisheries Science from Mississippi State University (1999). Jason is the manager of the Tennessee Valley Authority’s (TVA) Calibration & Testing Services workgroup and has been a NALMS Certified Lake Professional since 2011. Jason has served as a NALMS board member when he was appointed as the At-Large Director in 2012. He was then elected as the At-Large director and then appointed as the Region 4 director.



Mike Malon, CLM

Mike Malon, C.P.E.S.C., C.L.M., is an engineering technician for the USDA-NRCS in Hilo, HI. He was formerly a hydrographic surveyor for the U.S. Army Corps of Engineers, Rock Island District, and taught for the University of Dubuque.  He has served as resource conservationist for the Jo Daviess County Soil and Water Conservation District for five years, where he specialized in watershed management, watershed modeling, and sustainable food production.  His experience in ecological systems was honed through previous work for the U.S. Forest Service, the Illinois Department of Natural Resources, and the Illinois Department of Agriculture.  He has served on the board of directors for the Galena River Watershed group, Jo Daviess County Water Protection Partnership, and Yellowcreek Watershed group, and is a co-founder of the Jo Daviess County Horticultural Society.  He served on the technical advisory committee for the Illinois Urban Manual, and served as project manager for the Apple Canyon Lake Watershed Plan.  He earned a B.S. in environmental science from the University of Dubuque, and a M.S. in environmental policy and management from American Public University.



Peter Berrini, CLP
Berrini & Associates, LLC
pberrini@comcast.net / 217-899-2153

Peter is a Professional Geologist and Certified Lake Professional with significant project experience in all aspects of lake and reservoir restoration and has specialized in planning, designing, permitting and implementing lake dredging projects throughout the United States for more than 30 years. He has been integrally involved with the completion of numerous dredging and sediment dewatering projects ranging in size from 300 cubic yards to 3,000,000 cubic yards and is a strong proponent of beneficial sediment reuse. In addition, he has managed numerous Clean Lakes Program Diagnostic-Feasibility Studies and Phase 2 Implementation Projects throughout his career that has included reservoir sedimentation surveys, shoreline protection designs, watershed plans, lake aeration and water quality enhancement alternatives.

Deanna Doohaluk, CLP
Hey and Associates, Inc.

Sandy Kubillus, CLM
Sr. Environmental Consultant

Specializes in lake and pond management and consulting, especially water and sediment quality, bathymetric mapping, lake management plans, shoreline erosion control, wetland delineations and permitting. Active in the Illinois Lakes Management Association. Sr. Environmental Consultant with ILM since 1994. Adjunct instructor for Environmental Biology at the College of Lake County.

Michelle B. Nicol, CLM
City Water, Light, and Power
Michelle.Nicol@cwlp.com / 217-757-8660 ext. 1025

Michelle Nicol is the Supervisor of Land and Water Resources for City Water, Light and Power in Springfield, Illinois and has been with the utility since 1990. She manages Lake Springfield, a 4,200 surface acre reservoir that serves as the City’s drinking water supply. Michelle has a MA in Environmental Affairs, specializing in aquatic biology, from the University of Illinois at Springfield. She is a volunteer with the Illinois Environment Protection Agency’s Volunteer Lake Monitoring Program. Her duties include being actively involved in projects within Lake Springfield’s 265-square mile watershed. Michelle has served on the Board of Directors of the Illinois Lake Management Association for several years.

Brian Valleskey, CLP
Manhard Consulting, Ltd.



Caleb Asbury, CLP
Davey Resource Group

Caleb Asbury, M.S.E.S., is a biologist and site manager with Davey Resource Group’s Natural Resource Consulting team. Mr. Asbury assists with a wide variety of ecological projects, including invasive species management, water quality monitoring, wetland mitigation monitoring, freshwater mussel surveys, macroinvertebrate collections, aquatic vegetation and sediment sampling, and bat tree habitat identification. Mr. Asbury also serves as a team leader for Indiana DNR Lake and River Enhancement projects involving lake and watershed diagnostic, engineering, aquatic vegetation, and sediment removal studies. He is a licensed applicator through the Office of Indiana State Chemist (F250567) and regularly treats invasive vegetation species in deep water, wetland, and upland habitats. Prior to joining Davey Resource Group, Mr. Asbury worked with the Indiana Department of Environmental Management on data collection for fish community assemblages and E. coli monitoring, Qualitative Habitat Evaluation Index (QHEI), and the Index of Biotic Integrity (IBI) for lotic systems, including fish and macroinvertebrate communities. Mr. Asbury is a Manchester University graduate with a bachelor’s degree in biology and environmental studies. He also has a master’s degree in environmental science with a concentration in applied ecology from Indiana University.

Shaun Hyde, CLM
SePRO Corporation

Sara Peel, CLM
Arion Consultants, Inc.

Sara Peel, CLM currently serves as the At-Large Director on the NALMS Board of Directors. Sara is an Environmental Consultant for Arion Consultants and previously served as Director of Watershed Projects for the Wabash River Enhancement Corporation, a nonprofit focused on improving ecological, economic, and social conditions within the Wabash River basin. Sara received her BS in Biology and Chemistry from Alma College and her MS in Environmental Science from Indiana University School of Public and Environmental Affairs. Sara has over 16 years of water quality and watershed management experience. She currently serves as the President for the Indiana Lakes Management Society, is a board member of the Indiana Water Monitoring Council, and on the Purdue University School of Agriculture Dean’s Advisory Council.



Marie Esten, CLM
U.S. Army Corps of Engineers New England District

Wendy Gendron, CLM
Aquatic Restoration Consulting, LLC

Ms. Gendron is a Certified Lake Manager with 17 years of experience in water resources management. She currently owns Aquatic Restoration Consulting, LLC, a small consulting firm specializing in lake, river and watershed management. She also works as a Project Manager with the Army Corps of Engineers managing large aquatic restoration projects. Prior to 2009, she worked at AECOM as an environmental consultant. She’s been a NALMS member since 1998 and has participated in annual symposia as a presenter, session monitor and on the membership committee. She is active in the local chapter (NEC-NALMS) where she serves on the Leadership Committee and as Secretary.

“NALMS is important to me professionally and personally. NALMS keeps me up to date on the latest science through the publications and conferences, but it’s more than just a scientific resource, it’s a family. The organization is unique in that it welcomes scientists, academics and all lovers of lakes. I look forward to annual conferences where we share ideas and catch up with friends. I would be honored to serve on the Board where I can actively participate in the continued success and growth of the organization, especially in these ever-changing physical and economic climates.”

Albelee Haque, CLP
Bangladesh Environment Network

David Mitchell, CLM
ABT Associates

Dr. Mitchell is an aquatic ecologist with 27 years of experience in water quality and watershed assessment, aquatic restoration and monitoring projects, water toxics control, ecological risk assessments, and water quality permitting throughout the United States. He has extensive experience in Clean Water Act regulatory compliance, permitting and policy issues. Dr. Mitchell presents frequently at national water resource management and nutrient/water quality conferences, has over 70 technical publications and presentations, provides expert testimony, and has co-authored technical manuals for lake/pond management and macrophyte control. Dr. Mitchell received his Ph.D. from Cornell University in Ecology and has been a Certified Lake Manager (CLM) certified by the North American Lakes Management Society since 1991 (inaugural class).

Kenneth Wagner, CLM
Water Resource Services LLC

Dr. Wagner holds degrees from Dartmouth College and Cornell University, with his Ph.D. earned in Natural Resource Management in 1985.  He has over 40 years of experience working on a variety of water resources assessment and management projects, including lake, reservoir, river, and watershed assessment, rehabilitation, and management, regulatory processes, and educational programs.  In 2010 he started Water Resource Services, a small company with a focus on water supply protection and lake management consulting. He is a former President of the North American Lake Management Society and former Editor in Chief of Lake and Reservoir Management, a peer-reviewed journal.

David Wong, CLM
Massachusetts DEP

Lake Management and Invasive Species Control







Ann St. Amand, CLP
PhycoTech, Inc.

PhycoTech, Inc. is an environmental consulting company located in St. Joseph, Michigan specializing in aquatic analyses and dedicated to raising the standards in our industry. Our analysis services include: identification, enumeration, biovolume (algae) and biomass (zooplankton). We are a leader in our industry, providing our customers with a wide variety of related services based on the most current technology, including permanently mounted, archival slides of both algae and zooplankton. We also process core samples for diatoms and blue green akinetes.



Joseph Bischoff, CLM
Wenck Associates

Joe Bischoff is a Principal Aquatic Ecologist who leads the Lake Management and Water Quality division for a regional water resources engineering firm in Minnesota.





James A. Johnson, CLM
Freshwater Scientific Services

James Johnson (MS Limnology, UMN–Twin Cities; BS Conservation/Zoology, UW–Madison) is the owner of Freshwater Scientific Services (fixmylake.com) and has over 20 years of experience working closely with citizen lake groups, local/state government, and university researchers to protect and improve the waters in the MN and WI. He specializes in developing lake management plans, monitoring and managing aquatic invasive plants, promoting the recovery of native plant communities, mapping urban stormwater ponds, and researching the impacts of common carp on wild rice and other native aquatic plants. He is currently the chair of the Minnesota Statewide Aquatic Invasive Species Advisory Committee and has served on various technical advisory panels for the University of Minnesota, MN Department of Natural Resources, and planning committees for regional lakes conferences.

Daniel McEwen, CLP
Limnopro Aquatic Science, Inc.

Dan McEwen, Ph.D., CLP, is the owner/operator of Limnopro Aquatic Science, Inc., a lake consulting company in central Minnesota. Previously, he held an appointment as an Associate Professor at Minnesota State University Moorhead where, for eight years, he taught courses in ecology, aquatic biology, environmental science, and quantitative methods. During summers he did field and laboratory research on shorebird-insect relationships in arctic Alaska. He earned his Ph.D. from North Dakota State University where he studied alternative stable states of shallow lakes and water-level management impacts to macrobenthic invertebrates in the large lake system of Voyageurs National Park. He became a NALMS Certified Lake Professional in 2017 and currently runs Limnopro and teaches as adjunct faculty at regional colleges and universities.

Dick Osgood, CLM
Lake Advocates
dick@dickosgood.com / 952-237-0969

Dick Osgood is educated as a scientist (MS Aquatic Ecology & Geology; BS Biology), experienced as an Environmental Planner and is a Certified Lake Manager, and has worked for and with public, private and nonprofit organizations. Dick specializes in developing lake management plans, invasive species management, diagnostic studies, modeling and alum dosing. Dick has authored numerous scientific journal papers, made hundreds of presentations at professional meetings, is the author of regular columns and has frequently served as an expert witness. Dick is also trained as a mediator and facilitator. Dick has served on the Board of Directors of the North American Lake Management Society (Past-President, Treasurer), Minnesota Waters (Vice-Chair) and Minnesota Lakes Association (Officer & Public Policy Committee chair), Conservation Minnesota, Excelsior Rotary Board and the South Lake-Excelsior Chamber of Commerce Board. Dick was an invited delegate to the Symposium on the Ecological Basis for Lake and Reservoir Management at the University of Leicester, England, is a co-instructor of the Alum Workshop at the Annual North American Lake Management Society Workshop, has authored a chapter in the book ‘Managing Lakes and Reservoirs’, and Dick’s consulting business, Osgood Consulting, was named the North American Lake Management Society’s ‘Outstanding Corporation’ in 2005.

Jo Stuckert, CLM
Blue Water Science

Jo Stuckert is an Aquatic Scientist for Blue Water Science, a consulting firm in St. Paul, Minnesota. She has over 25 years experience in conducting aquatic plant surveys, zooplankton and phytoplankton identification, and fisheries management in Minnesota, Wisconsin, the Bering Sea, and Northern Pacific Ocean.  Currently her emphasis is on aquatic invasive species management and control.




Reynaldo Gumucio, CLM


Tyler Fowler, CLM
Waterworks Industries, Inc.

Tyler is currently the Regulatory Compliance Manager at Waterworks Industries Inc. located in Windsor, CA. He earned an undergraduate degree in Environmental Studies at San Francisco State University in 2005 with a minor in Geography. Tyler entered the field of Lake Management in 2007 and has been managing lake, reservoir and lagoon systems for twelve years. Tyler specializes in developing and implementing lake and lagoon management programs as well as providing regulatory compliance and permitting for various private clients and municipalities throughout the Western United States. Tyler is also a licensed applicator in California, Nevada and Oregon.

Todd Tietjen, CLM
Southern Nevada Water Authority

Todd Tietjen has worked in lake management and applied limnology for over 2 decades. He received a B.A. in Environmental Studies from Alfred University, a M.S. in Aquatic Biology from Southwest Texas State University and a Ph.D. in Aquatic Ecology from the University of Alabama. Since 2008 he has worked as the staff limnologist for the Southern Nevada Water Authority working on Lake Mead and the Lower Colorado River. Prior to this, he was an Assistant Professor of Aquatic Resources at Mississippi State University. He was Co-Chair of the NALMS 2013 conference in San Diego and is an Associate Editor for Lake and Reservoir Management.


New Hampshire

Don Kretchmer, CLM
DK Water Resource Consulting

New Jersey

Christopher Doyle, CLM
SOLitude Lake Management

Larry Kovar, CLM
Aquatic Analysts, Inc.

Evan Kwityn
Princeton Hydro LLC

Mr. Kwityn is committed to effectively communicating empirical and quantitative scientific results with non-scientists, and work with both scientists and non-scientists to shape environmental policy that depends on good and well-understood science. Mr. Kwityn graduated from Rutgers University New Brunswick in 2013 with a degree BS in Marine Biology and is receiving his MS in Marine Biology and Coastal Sciences from Montclair State University in 2018.


New York

Matthew Albright, CLM
SUNY Oneonta Biological Field Station

Willard Harman, CLM
SUNY Oneonta Biological Field Station

Bill Harman has directed the State University of New York College at Oneonta Biological Field Station since 1968.  He holds the endowed R.J. Thayer Chair for Otsego Lake Research and has taught General zoology, Aquatic Biology, Marine Biology, Entomology, Parasitology, Malacology, Small boat Handling and Marlinspike Seamanship,  Biological Research Methods for SCUBA Divers, Lake Management and Management of the Aquatic Biota.  He now directs Master of Science in Lake Management and Professional Science Master’s degree programs, the only such programs in the country.  He is active in the Northeast Aquatic Nuisance Panel, the New York State Invasive Species Taskforce Advisory Council and Vice President of the New York State Federation of Lake Associations.  Students are now working in professional venues in the United States and Internationally. He spent 6 years in the US Navy as a diver in Explosive and Nuclear Ordnance Disposal, received a BS degree from the NYS College of Forestry (Wildlife Management) and a Ph.D. from Cornell University with concentrations in limnology, invertebrate zoology, and marine ecology.

Steven LaMere, CLM
Adirondack Ecologists, LLC

Steve is recognized by the American Academy of Environmental Engineers and Scientists as a Board Certified Environmental Scientist in Surface Water Resources and is also a Certified Lake Manager (the first CLM certified in New York State and one of the first twelve in the U.S.). He is the President of the environmental consulting practice, Adirondack Ecologists, LLC and has performed research on over 100 lakes and ponds in NY during his 28-year career.  Steve also serves as the Region 5 Director and Environmental Policy Analyst for the New York State Conservation Council, Inc., and as a Board Member of the New York Sportsmen’s Advisory Council.

Jason Eric Luce, P-CLM
SOLitude Lake Management

Michael Martin, CLM
Cedar Eden Environmental, LLC
mmartin@cedareden.com / 518-304-3697

Michael R. Martin, CLM, is president of Cedar Eden Environmental of Saranac Lake, New York, and past president of the North American Lake Management Society. He is a former Regional Director of NALMS and the New York Federation of Lake Associations and a founding member of the Indiana Lake Management Society. Michael has over 30 years of lake and watershed management experience in the public, private, and academic/not-for-profit sectors, where he has studied and developed management programs on hundreds of water bodies throughout the New York, New Hampshire, Pennsylvania, New Jersey, Delaware, West Virginia, Virginia, and Indiana. As the founding executive director of the Adirondack Aquatic Institute, Michael helped establish a volunteer lake monitoring program and brought to light critical water resource issues facing the Adirondack region. He began his career as an environmental scientist with the State of New Hampshire, where he co-founded NH’s citizen lake monitoring program and developed its water quality database. Michael was the recipient of NALMS’s 2001 Technical Excellence Award for Public Education and Research in recognition of extending effective and creative education in lake restoration, protection and management to youth, to citizens, and to professionals. He founded LakeStewardship.org in 2006, a non-profit organization that promotes lake and environmental stewardship, providing resources for lake residents, lake associations, and cottage owners. Michael has a degree in Botany from the University of New Hampshire, specializing in limnology and phycology.

Dan Stich, CLM
SUNY College at Oneonta – Biology Dept.

Holly Waterfield, CLM
SUNY Oneonta Biological Field Station

Kiyoko Yokota, CLM
SUNY Oneonta Biological Field Station

Kiyoko Yokota, Ph.D., CLM, has been an Assistant Professor of Biology at State University of New York College at Oneonta (SUNY Oneonta) since 2013 after teaching at the University of Tampa in Florida for 5 years. She teaches limnology, management of aquatic biota, and phytoplankton ecology for the Lake Management MS program at the SUNY Oneonta Biological Field Station in Cooperstown, NY, as well as for undergraduates on the main campus. She earned her BS in biology with an ecology emphasis and a minor in environmental studies from St. Cloud State University and her Ph.D. in Ecology, Evolution and Behavior from the University of Minnesota.


North Carolina

West Bishop, CLP
SePRO Research & Technology Campus

West’s research focus is on efficient proactive and reactive algae management as well as water quality improvement.

David Buetow, CLP
Charlotte-Mecklenburg Storm Water Services

Clinton Calhoun, CLM
Town of Lake Lure

Clint graduated from Gardner-Webb University in ’96 with a B.S. in Biology. He has worked as a naturalist and environmental biologist in the Hickory Nut Gorge Area of western North Carolina since 1997. From 2003 to 2006 he served as the Watershed Coordinator for the Upper Broad River Watershed and now currently works for the Town of Lake Lure Lake Operations Department as Environmental Management Officer. Clint is an avid outdoorsman and enjoys hiking, fishing, SCUBA diving, and nature photography.

H. Dean Givens, CLM
Town of Lake Lure

H. Dean Givens has been the Director of Lake Operations for Lake Lure since 2008.

Barbara Wiggins, CLM
Wiggins Environmental Services

Barbara Wiggins has been involved with water quality, lake and watershed issues since 1980. She was certified as a Lake Manager in 1992. She has her own business, Wiggins Environmental Services, Inc., a women’s owned business since 1997. WES has developed watershed plans, assessed lake problems, developed lake surveys, performed boating use analyses, provides general consultation and grant applications for clients in North Carolina and the SE. She has worked for other firms and agencies for the past 10 years as a consultant on various environmental projects. Her background includes fourteen years working in regulatory inspections along with surface and groundwater monitoring activities at the Mecklenburg County Department of Environmental Protection, Charlotte, NC. Barbara has been an active member of the North American Lake Management Society (NALMS) since 1987. Her activities with NALMS includes past Region IV Director, NALMS Treasurer and various committee participation. She has been active in the NALMS conferences in the southeast region. She is currently Treasurer for NCLMS and has been president, interim newsletter editor and provided conference assistance for NCLMS annual meetings and workshops.


Nova Scotia (Canada)

Cameron Deacoff, CLP
Halifax Regional Municipality

Cameron serves as the municipality’s senior subject matter expert with regards to water issues. In this capacity, Cameron serves on inter-jurisdictional committees on stormwater and wastewater, develops and leads water quality monitoring programs and projects, leads floodplain and watershed studies in support of regional planning initiatives, supports the development and implementation of climate change adaptation and mitigation projects and studies, and works with local universities, non-governmental organizations and other groups to achieve shared aims in environmental stewardship.

Darrell Taylor, CLP
Nova Scotia Environment



Jessica Glowczewski, CLM
City of Akron Water Supply

Ms. Glowczewski is the Watershed Superintendent for the City of Akron. She has been involved in watershed management for ten years with experience in program development, watershed stewardship and education, recreational and drinking water supply reservoir management, stormwater and property management, project design, environmental monitoring, sampling, and grant writing for the Upper Cuyahoga River Watershed and Lake Rockwell, LaDue, East Branch and Mogadore Reservoirs. She was directly involved in the development and implementation of the only Ohio EPA approved Watershed Control Program. She earned her Conservation BS from Kent State University and is licensed as a Class III Water Supply Operator and a Commercial Pesticides Applicator through the Ohio Department of Agriculture.

Ontario (Canada)

Brian Ginn, CLM
Lake Simoe Region Conservation Authority

Brian is the Limnologist with the Lake Simcoe Region Conservation Authority in Newmarket, Ontario, Canada. His research expertise uses organisms to monitor environmental conditions, assess ecological change, and develop lake management strategies. To date, his research has addressed environmental issues such as: surface-water acidification, nutrient inputs (eutrophication), changes in fish habitat, climate change, and how landscape development (i.e. urbanization) impacts lake environments.


Joseph Eilers, CLM
Maxdepth Aquatics, Inc.

BA Biological Sciences, University of California- Santa Barbara MS Water Resources Mgmt, University of Wisconsin- Madison Previous Positions Wisconsin Department of Natural Resources (1978-1984) USEPA Environmental Research Laboratory-Corvallis (contractor)(1984-1988) Environmental Consultant including current position with MaxDepth Aquatics, Inc. (1988-present)



Edward Molesky, CLM
Aqua-Link, Inc.

Rhode Island

Matthew Ladewig, CLM
ESS Group, Inc.

Carl Nielsen, CLM
ESS Group, Inc.


South Carolina

Julie Davis, CLM
Greenwood County Lake Management

Born and raised in the upstate of South Carolina, Julie Marie Corley Davis has served as Director of Lake Management for Greenwood County since the fall of 2006. Lake Greenwood, situated in the foothills of SC is an 11,400-acre lake owned by Greenwood County and bordered by three counties. Lake Greenwood, a FERC licensed project, was created in the late 1930s and is a treasure for the surrounding communities. After graduating from Clemson University with a Bachelor of Science in Resource Management and a Minor in Wildlife, Aquaculture, and Fisheries Biology, Julie began her professional career with the SC State Park Service. After working with them for six years, she went back to Clemson and obtained her Master’s degree in Parks and Protected Area Management. After graduation, Julie was hired on with Greenwood County when the Lake Management Department was created in 2006.

Julie became one of the first Certified Lake Managers in South Carolina as recognized through the North American Lake Management Society. Along with this, she is a Certified Erosion Prevention Sediment Control Inspector, Master Pond Manager, and a licensed Herbicide and Public Health Applicator. When off duty, she travels home to the lake on which she lives, Lake Thurmond, or as most remember it, Clarks’ Hill. Lake Thurmond is on the Savannah River in McCormick County on the border between GA and SC. There, she lives with her husband, Matt and two labs, a black lab named “Lizzie” and a chocolate lab named “Chloe”. They are out on the lake as often as possible.



Levi Sparks, P-CLM
Bandera County River Authority and Groundwater District (BCRAGD)


Derek Johnson, P-CLM
SOLitude Lake Management

David Rosenthal, CLM
City of Norfolk

David has been the Reservoir Manager for the City of Norfolk, Department of Utilities since 1990, where he manages the city’s 8 reservoirs, 6 dams and over 200 miles of shoreline.  He holds a Bachelor’s Degree from the University of Akron, Akron, Ohio, in Natural Sciences and a Master’s Degree from Western Connecticut State University, Danbury, CT in Limnology and Oceanography. He is a Past President & Associate Director with the Virginia Lakes and Watersheds Association and has served on numerous committees for NALMS, including the Professional Certification Committee. He also served as Region 3 Director and NALMS Secretary.



Judith Dudley, CLM

Brian Mattax, CLM
Owner & Sr. Ecologist, Mattax Solutions
Sr. Aquatic Scientist, Louis Berger

Terry McNabb, CLM

Terry McNabb is a graduate of Michigan State University with a degree in Water Resource Management and operates Aquatechnex, LLC.  Aquatechnex LLC is a full service lake and aquatic plant management firm that operates from offices in California, Oregon, Washington, Idaho and Montana. The firm has a recognized expertise in the restoration of lake and river systems impacted by invasive aquatic weeds and management of Harmful Algae Blooms. Terry has been involved in lake management for over 40 years. He is a past president of the Aquatic Plant Management Society, the North American Lake Management Society and the Western Aquatic Plant Management Society. He is a recipient of the US Asia Environmental Partnership grant to work with lake restoration activities in Malaysia and Indonesia. He is a cooperator with the US Army Corps of Engineers Aquatic Plant Control Research Program and an instructor for the University of California-Davis Aquatic Weed School. 


Reesa Evans, CLM
Adams County LWCD

Jacob Macholl, CLM
Short Elliott Hendrickson Inc.


South Africa

William Harding, CLM
DH Environmental Consulting

Learn more about the NALMS Certification Program