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Staff & Board of Directors


Duane Mohr, District Manager

Linda Dunn, Office Manger

Nicole Slazinski, Conservation Specialist

Seth Hatfield, Conservation Specialist

Alex Murphy, Conservation Specialist

James Mitchell, Conservation Specialist

Veronica Tangiri, Water Quality Programs/Adopt-A-Stream Coordinator 

Jessica McCaulley, Education Specialist

Jay Yankey, Cost-Share Specialist

Board Members:

John Price, Chairman

Will Lintner, Vice Chairman

Mansimran Kahlon, Treasurer
Thomas Bolles, Director, Virginia Cooperative Extension Agent

Tiziana Bottino, Director


Duane Mohr, District Manager
Duane has been volunteering with the Prince William SWCD since September 2017. He had volunteered more than 500 hours, working with county citizens on urban and suburban storm water management, conservation planning, nutrient management, grazing management, and youth education programs. Duane was recognized at the Virginia Association of Soil & Water Conservation Districts 2018 Annual Meeting as the state's Earth Team Volunteer of the Year. He also won the NRCS 2018 National (and Southeast Region) Earth Team Individual Volunteer Award.

As of July 2019, Duane has joined the team as a Conservation Technician. He is now the District Manager. He currently lives in Nokesville with his wife and 1 Horse and 8 Sheep.


Linda Dunn, Office Manager
Originally hailing from Upstate NY, Linda recently relocated from Frederick MD to Haymarket. Linda quickly rose to the top of the massive resume pile. She’s very happy to be a part of our team and is looking forward to learning more about the district. She enjoys playing golf, tennis and enjoying nature while hiking and biking.


Nicole (Ethier) Slazinski, Conservation Specialist
Nicole joined the District in September, 2006. Nicole earned her Bachelor of Science in Integrated Science and Technology from James Madison University. Her work with the District includes technical assistance to local farmers and horse owners by providing them with environmentally sensitive, efficient, affordable and practical methods in managing their operations. She also organizes educational seminars on topics such as Rain Barrel Workshops, Healthy Horses and a Healthier Chesapeake Bay, Guide to Setting up a Horse Farm, and other agriculture related seminars for county and area residents. Nicole also works on this website. :O

Nicole lives in Sterling with her husband, 3 kids, and 2 cats.


Seth Hatfield, Conservation Specialist

Seth joined the district as a conservation specialist in March of 2022, after graduating from Liberty University with a Bachelors in Environmental Biology the previous fall. While still in high school, Seth volunteered with the District's water quality monitoring program and attended the Youth Conservation Camp. While completing his degree, he went on to fulfill internships with Prince William County Environmental Services as well as NOAA's Great Lakes Environmental Research Lab. With NOAA GLERL he completed a research project investigating the impact of invasive species on larval fish and zooplankton in the great lakes. At Liberty, Seth also completed a capstone research project studying physiological responses to predation in woodfrog tadpoles. 

Seth has lived in Prince William County for over ten years at Heaven Scent Farm in Gainesville, where his family raises beef cattle and hosts educational farm visit programs and birthday parties. He enjoys backpacking, weightlifting, music, as well as drawing and painting. 

Alex Murphy, Conservation Specialist
Alex joined the District in April, 2022.  Alex earned a Bachelor’s of Science Degree in Environmental Science from George Mason University.  Concentrating in Ecological Science, he has experience in system approaches to maintaining environmental quality.  While at George Mason University Alex conducted a year-long study on the relationships between soil structure and plant diversity.  Prior to college, Alex was the first generation of Virginia’s Earth System Science Scholars (VESSS), a program offered by the Virginia Space Grant Consortium and NASA Langley to investigate the dynamics of Earth systems.  


James Mitchell, Conservation Specialist
James graduated from James Madison University with a degree in Geographic Science in May 2022. He enjoys spending time outdoors and going on adventures. James lives on a hay farm and has been bailing for many years.   


Veronica Tangiri, Water Quality Programs Coordinator
Veronica joined us as a staff member in February 2016. She is a Certified Save Our Streams Program Manager for biological citizen water monitoring in Prince William County.

Born and raised in Cameroon, Veronica has always had a keen interest in the earth's natural beauty. She wrote articles for environmental awareness-raising, and amongst them was "Empower the woman and save the environment". She later received a graduate program admission in Sweden where she pursued environmental sciences, and later on she began exploring the Geographic Information System (GIS) as a vital tool for the environment. When her family immigrated to the United States, Veronica joined them in Virginia in 2009.

Veronica believes the environment is a web and looks forward to learning even more about the connections through physical/data analyses and tools like the GIS. She has a certificate in Disasters and Ecosystems: Resilience in a Changing Climate by the United Nation Environmental Program and Python Programming certificate from George Mason University. She is working on her master's research in GIS Ecosystem Analysis at the Lund University. She has a Master's Degree in Environmental Sciences from the Mid-Sweden University, GIS Certificate from Umea University, and a Bachelor of Science in Geology (major) and a minor in Biology from the University of Buea in Cameroon.

Veronica worked as a team leader intern in natural resources management for the National Park Service at Prince William Forest Park. She also worked as a volunteer for the Smithsonian Conservation Biology Institute in Front Royal, Environmental Services of Arlington County, and the Natural Resources Management of Fairfax County Parks Authority. As a certified stream monitor she helps with the Northern Virginia Soil and Water Conservation District. She is a certified Virginia Master Naturalist, a board member of the Prince William Wildflower Society. She is also a member of the Student Conservation Association/AmeriCorps, Society for Conservation GIS and the Ecological Society of America (ESA). She received a certificate for Community Stream Stewardship from Prince William Conservation Alliance (PWCA) and holds a Stadia Board Society honors from the National Map Corps of the United States Geological Survey (USGS).


Jessica McCaulley, Education Specialist

Jessica joined the staff in October 2020, after volunteering with the District as a Water Quality Monitor since 2016. She grew up in Manassas and then moved to southern Virginia to attend college. Jessica has a Bachelor’s Degree in Sociology from Radford University, and a Master’s Degree in Agricultural and Life Sciences from Virginia Tech. After college, she worked as an AmeriCorps member at a non-profit called Beans and Rice, Inc. Her lifelong interest in the outdoors landed her a job at Blacksburg Parks and Recreation, taking people rock climbing in West Virginia, and white-water rafting on the New River.

​Jessica began Water Quality Monitoring while working on Evergreen Acres Organic Farm, owned and operated by Jim Gehlsen, the Vice Chairman of the District’s Board of Directors. Jim introduced her to the District staff members and encouraged her to become a certified Water Quality Monitor, as well as a volunteer for Farm Field Days, MWEE, and the Farm-to-Table Fundraisers.

After working on the farm, she worked as a Naturalist at Huntley Meadows Park where she earned the Interpretive Guide Certification and led programs about wetlands ecology, environmental conservation, and more. Currently, Jessica is a Master Gardener Intern through the Virginia Cooperative Extension in Prince William County. Her goals as a Master Gardener Intern are to teach students hands-on, agricultural education and to spend as much time as possible in the Teaching Garden.

She lives in Manassas with her husband and son, along with their rescue pup, Quill.

Jay Yankey, Cost-Share Specialist

Jay returned to the District in October 2011 after serving as the Education and Conservation Specialist from February 2002 through March 2005. Jay brings his expertise in agriculture production and natural resources conservation to the traditional farmers, small acreage/specialty crop producers, exotic livestock and horse operations.

Jay is a Prince William County native, growing up on the family farm in Nokesville. His family raised cattle, grain, and hay as part-time farmers. Jay graduated from Brentsville District High School and received his B.S. in Agribusiness and Environmental Science from Ferrum College. Jay is an active member of the Virginia Farm Bureau, and currently serves on the Prince William/Fairfax Farm Bureau Board of Directors. Jay has chaired the Virginia Farm Bureau Young Farmers Committee.
Jay, his wife, Sonja and daughters Ali and Beth, and son Carter, own and operate Yankey Farms, a Community Supported Agriculture vegetable farm and market in Nokesville.


John Price, Chairman
Information Pending


Will Lintner, Vice Chair

Will joined the Board as an elected member on January 1, 2020. He and his wife are long time residents of Prince William County, both graduated from Woodbridge Senior High School. They raised two daughters here.  Mr. Lintner has a B.A. degree in Biology from George Mason University and a B.S. degree in Mechanical Engineering from George Washington University. His desire for safeguarding the environment, especially the quality and quantity of the water within the aquifers, streams and the Potomac River that are a crucial to the residents and wildlife led him to seek office as a director.

Before becoming a Prince William Soil and Water Conservation District Director, Mr. Lintner was employed as an engineer, technical expert and project/program manager by the Federal Government. During his career he worked in the areas of energy efficiency of buildings, adoption of renewable energy, industrial water treatment, water and steam system efficiency, heating and power plant operations, and environmental clean-up.  He provided policy guidance, training, financial assistance and technical expertise to the Federal agencies to assist them in meeting their Federal goals in many of those areas while reducing operational costs. He also collaborated with private companies owning energy intensive laboratories and data centers to assist them with reducing costs through the adoption of best practices that increase the efficient use of energy. Mr. Lintner was the Vice Chairman of the Northern Virginia Section of the American Society of Mechanical Engineers for many years concurrent with his Federal employment.

Mansimran Kahlon, Treasurer
Information Pending


Thomas Bolles, Director

Thomas is the Agriculture Extension Agent in Prince William County. His interests include agricultural and environmental education for adults and children, aquaculture and hydroponics and food security/sovereignty/ justice. Thomas is a certified urban nutrient management planner and is trained in facilitation.  In the past, he has been to Afghanistan twice to work on agricultural development. He also taught in public schools for 13 years. Thomas earned a bachelor’s degree in History from Virginia Commonwealth University and a master’s in Agriculture and Extension Education.


Tiziana Bottino, Director
Information Pending

Associate Directors

Steve Danziger
Steve served on the District Board for 14 years. Steve is a Senior Program Manager of Technology Diversification for BAE Systems in Manassas and the former Director of Operations for Micron Technology in Manassas. Steve has a BS in Physics from Queens College, City University of New York and a MS in Physics from Pennsylvania State University. Steve is a member of Virginia Joint Commission Science and Technology (Nanotechnology), the Prince William Service Authority Board of Directors, Didlake Foundation Executive Board, and the IEEE Science/Technology Public Policy Subcommittee. He is a former member of the Prince William Park Authority, member of United Way of American's Public Policy Board, President of United Way of Virginia, Chairman of Prince William United Way Executive Board. Steve holds over thirty patents and co-authored publications on technical and management topics. He enjoys swimming, tennis, reading and travel. Steve is married and lives in Bristow.


Clay Morris

Clay Morris is currently an Environmental Program Manager with the Prince William County Department of Public Works - Environmental Management. His team heads up the stream restoration and reforestation programs for the County. He is responsible for providing environmental guidance for the various land uses cases within the County. He is also responsible for implementing the Chesapeake Bay Preservation Act for the County.

Clay was a long time owner of a stable of racehorses until he married an economist. He then pursued other passions in botany and natural resources. He received Associate degrees in Horticulture and Natural Resource Management from Lord Fairfax Community College, a Bachelors of Science in Environmental Studies from Shenandoah University, and a Masters of Science from the University of North Carolina - Wilmington. He is an avid gardener with interests in ethnobotany, permaculture, and regenerative agriculture. He currently leads classes in foraging. He lives in White Post in Clarke County with his wife and two children.


Harrison Glasgow
Harry comes to us from Fairfax County. He has served the Northern Virginia Soil & Water Conservation District since 2005. He is a member of the Fairfax County Park Authority board from 2005 through 2012. He is a member of the Fairfax Chesapeake Bay Exceptions Committee 2003-2012, and the Fairfax County Tree Commission member since 2006 and serves as chair since 2008.

Harry is a member of the Friends of Huntley Meadows Park, 1990 to present; member of Fairfax County "Friends" Groups: Hidden Oaks Nature Center, Meadowood Farms, Archeology, Riverbend Nature Center, and Lake Accotink Park. He received the Fairfax County "Lord Fairfax Award" in 1993, the Fairfax County Federation of Citizen Association's "Citizen of Merit Award" in 2009, and is a member of the Prince William Conservation Alliance 2009 to present, and Chair of the Alliance Conservation Committee.

Harry was born and raised in Northern Illinois, educated in Illinois public schools and the University of Illinois. He served three years in the U. S. Army, joined the faculty of the U. S. Army Intelligence School at Ft. Devens, MA in 1966 as a civilian instructor. While living in MA he became increasingly interested in conservation matters and projects. He became a volunteer naturalist with the Mass. Audubon Society. He chaired his community's Wetland Conservation Commission which administers the state Wetlands Preservation laws. In 1989 he relocated in Northern VA working as an analyst with the Army's Intelligence Agency. He retired from Federal Service in 2001 and since then has devoted his time volunteering for conservation of his community's natural resources.

Harry states "I can think of nothing quite so simple to understand as the need to conserve the resources of our planet. If for no other reason than the health and well being of our family and ourselves, we should devote what is necessary to this end. The Soil and Water Conservation District program is one of the few direct 'cause and effect' organizations that aims exclusively for that goal. My experience with the Northern Virginia SWCD has been one of the most satisfying volunteer pursuits I have had. The Prince William SWCD offers another facet of that experience that I would like to explore." Harry serves the District on the Education, Technical Review and Finance Committees, and chairs the Districts Prince William Environmental Excellence Foundation, a 501(C)3 non-profit organization. Harry is an enthusiastic participant with our Farm Field Days, Arbor Day, Meaningful Watershed Educational Experiences for third grade students, and science fair events.


Sonnie Cuffey

Sonnie  started volunteering with the District as a Water Quality Monitor in 2014. He was introduced to volunteering by Veronica (our Water Quality Program Coordinator). Sonnie began his Water Quality Monitoring at his current stream at Dawkins Branch (Victory Lakes).  At Dawkins Branch, Sonnie has conducted stream monitoring & monthly chemical probe testing.


Sonnie serves as a County Poll Chief and volunteers with various County organizations where he encourages involvement in our Water Quality Program.

He loves local fishing and hiking in the Shenandoah.


Jim Gehlsen, Vice Chairman
Jim joined the District as the appointed Director in February 2012.  He has served as treasurer, chairman, and Vice Chariman.  He was elected Area II Chairman in December 2016. He earned his B.S. in Building Construction from Clemson University.  He and his wife, Jean, raised their 5 children on a 100 acre farm in Nokesville he bought in 1983 and named Evergreen Acres.  He planted his first christmas trees in March, 1984 and has been selling them since 1991.  He also grows hay and pumpkins.  Jim operated as a masonry contractor from 1979 to 2010 and still maintains his class A contracto'rs license.  He grew certified organic produce from 2010 to 2017 and was the first grower in PW county to be certified organic and GAP certified.  In 2017 he began construction of Cedar Run Brewery on his farm.


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