Board of Directors

Jim Martin, Land Preservation Committee Chair
Jim Martin, Board President
Director of Research and Development at McCormick and Company, Inc., Jim has worked to drive positive environmental change and encourage social responsibility as both a member of the Corporate Sustainability Team and Chair of the Technical Innovation Center Team. He enjoys running, biking, and hiking in the beautiful northern Baltimore County landscape he calls home and feels deeply committed to protecting and preserving the Gunpowder Valley watershed for future generations.
Inna Kolomiytsev, Vice President of Development
Inna Kolomiytsev is the Marketing & Business Development Director of Baltimore-based law firm of Niles, Barton & Wilmer, LLP where she manages the firm’s marketing and communication initiatives for all practice areas for the full-service firm. She received her MBA from Loyola University Maryland, and is a graduate of Stevenson University where she received a B.S. in Business Communication. She enjoys splitting time between the plethora of urban attractions, and running, biking and outdoor sports, and is passionate about protecting and educating the community on the region’s diverse natural environment.
Charlie Conklin, President
Charlie Conklin, Vice President of Operations
Retired Bethlehem Steel Corporate Manager. Gunpowder Valley Conservancy member since 1990. Current Board Supervisor of the Baltimore County Soil Conservation District. Active in church missions for restoring creation. Enjoys being in nature and working with various local and state boards and committees to help preserve and restore our natural inheritance and agricultural resources. Believes the world is enriched when we plant trees so that those who come after us can watch them grow.
Brandi Overstreet, Secretary
Brandi is a lead manager with T. Rowe Price and joined the GVC board in 2016. She studied Biology at the University of Utah and holds both B.S and M.S. degrees in Finance from Penn State and Loyola University, respectively. A 10-year resident of Baltimore, she spends her time outdoors cycling, sailing, and hiking with her Aussie sidekick, Maisie. She also enjoys writing and playing music. Having grown up in St. Mary’s County, she has a passion for the Chesapeake Bay and believes in the importance of preserving its surrounding environment.
Edward W. Stuebing, Ph.D. Treasurer, Founder and Past President
Edward W. Stuebing, Ph.D. Treasurer, Founder and Past President
Retired Physical Sciences and Life Sciences Research Program Manager for Joint Services Chemical and Biological Defense, Aberdeen Proving Ground. Founded the Gunpowder Valley Conservancy in 1989 and served five years as the first President. Treasurer ever since. In retirement, Ed enjoys playing trombone in a jazz big band and a symphonic concert band, and doing his best to keep up with the wonderful people who are the living, breathing, working, and playing Gunpowder Valley Conservancy.


Don Callihan
Don Callihan is a clinical microbiologist and retired Staff Scientist from BD Diagnostics in Sparks, MD. Since retirement he has become a Maryland Master Naturalist. He serves on the Baltimore Area Council, BSA, Conservation Committee in various capacities teaching conservation and ecology to Scouting youth and adults and is the Council Outdoor Ethics Advocate. Don is an active member of the Maryland Invasive Species Council and of the Lake Roland Nature Council’s Environmental and Historic Preservation Committee. Don lives in Cockeysville above the Loch Raven Reservoir and is committed to the health of the forest in watersheds feeding this important regional source of drinking water for Baltimore City and County as well as its significant recreation potential.
Stephanie Gordon
Stephanie Gordon is a Systems Engineer at Northrop Grumman Corporation and a transplant to the Baltimore area from Pittsburgh, PA. She joined the board in 2017 after receiving her Masters of Science from Johns Hopkins University, and her undergraduate Electrical Engineering degree from Lehigh University. Stephanie is an avid indoor gardener, and a hiking, biking, and kayaking enthusiast. As a resident of Baltimore City, she recognizes the importance of the natural resources of the Bay and surrounding watershed regions.
Chris Hannaby
Biography and image to be posted soon
John Miller,
John Miller
Trained as an industrial designer, John worked as an architect, house builder, custom woodworker, and wooden boat builder before moving to Maryland to retire. He has been a member of the Gunpowder Valley Conservancy for over a decade and served as Board Secretary for much of that time. With nine rain barrels on his own property, John is an ardent proponent of sustainable living and watershed preservation who loves hiking with his wife along the upper Gunpowder.
Nancy Pentz
Nancy is a retired Natural Resource Specialist from Baltimore County government where she most recently directed the development of watershed plans. She is a geographer, with an undergraduate degree from Bucknell University and a Master’s degree from the University of Iowa. She has been a long-standing supporter of the GVC and on the Membership Committee for seven years. She is a fervent water conservationist, loves walks in the woods, and preserving our natural resources, landscapes and history.
William (Bill) Rees
Bill is a retired Senior Business Analyst from the Baltimore Gas and Electric Company (BGE) and was in various leadership positions in the BGE Vegetation Management Unit during his 36 year BGE career. Bill is originally from southeast Pennsylvania and has a degree in Forest Science from Penn State. He is an outdoor enthusiast and enjoys traveling. Bill currently does part-time consulting and continues to be involved in industry standards development In his spare time he enjoys volunteering to plant trees in Catonsville where he lives and furthering the mission of protecting the environmentally significant Gunpowder River watershed. Bill has been with the Gunpowder Valley Conservancy since 2016.
Matt Simons
Matt is a Principal at SC&H Group, a CPA and Management Consulting Firm based out of Baltimore.  He is a graduate of Towson University and has lived in the Baltimore area for over 15 years. Spending time running, biking, and hiking in the Gunpowder region sparked his interest to become involved in preserving this fragile part of the county. Matt joined the Gunpowder Valley Conservancy in 2016 with a commitment to helping the organization develop and expand its presence throughout the region.  He appreciates the importance of preserving the natural landscape of Gunpowder Valley and is attracted by organization’s goals and enthusiasm towards its cause.

Advisory Council

Randy Davis
Randy Davis joined the Gunpowder Valley Conservancy Board in August 2017. He is currently the Controller for Catholic Charities of Baltimore, Maryland’s leading provider of human services to individuals and families of all faiths, ages and ethnicities. Randy has lived near the Gunpowder watershed all his life and is a graduate of Calvert Hall High School and Loyola University Maryland. He is also a Certified Public Accountant and Eagle Scout. In his spare time, Randy enjoys sailing on Middle River, golfing, biking, and spending time with his family. He is passionate about environmental issues and helping the Gunpowder Valley Conservancy achieve its mission.
Justin Esworthy
Justin is a partner of the private law firm Timmerman, Beaulieu, Hinkle & Esworthy, LLC based in Towson. When not involved in the litigation process, Justin enjoys spending time outdoors including hiking with his wife and two young sons. Justin and his family are currently building a home on their property that is in a conservation easement in White Hall, which encompasses a portion of the NCR Trail and Little Gunpowder Falls. Justin is committed to sustainable living and preserving natural resources. He became active with the Gunpowder Valley Conservancy in 2016.
Purnell Glenn
In 2016, Purnell received the Gunpowder Valley Conservancy's Community Leader of the Year award for significant achievements including but not limited to - coordinating and leading numerous community workshops (tree planting, rain barrel and more), contributing hundreds of hours of volunteer service, leading the effort to Bay Wise certify the Miramar Landing community (the first of its kind in Baltimore County,) and being a member of the GVC Clear Creeks Steering Committee. Purnell is also the President of Miramar Landing HOA, represents his community at the Essex Middle River Civic Council, volunteers for Young Life, and is a big brother to kids in need. He has been the owner of a small computer company since 1987. He grew up fishing on the bay which contributed to his love of the outdoors.
Dorothy Hinnant
Dorothy, retired from Sparrows point after 15 years, is now an active minister. She is very active in her Bowerman Loreley Beach community as Vice President of the Community Association. Additionally, she is President of Greater White Marsh County Council and a Board Member of The Restoration of Bird River Group.