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Barb Trader

(CEMWG Co-chair, AFL sub-group member, liaison to PAO sub-group)

Barb Trader retired to Frederick in 2016, with her husband, Mark Gregory, after a 40 year career in disability services and federal advocacy. Her masters and undergraduate degrees span two main interests – the enjoyment and preservation of wilderness areas and life satisfaction for people with significant disabilities. Barb’s environmental activism started at a young age and she was named the 1972 Youth Environmentalist of the Year by her Congressman, the Honorable Les Aspin. She’s a co-founder of the Multifaith Alliance of Climate Stewards of Frederick County, a member of the Sierra Club Catoctin Group and the Smarter Growth Alliance, and a board member of Envision Frederick County and SHIP of Frederick County (the Student Homelessness Initiative Partnership).  In 2019, Barb founded Healthy Soils Frederick, which has already achieved some legislative success toward the advancement of regenerative land management practices. Barb co-authored the Climate Emergency Resolution and was a leading advocate toward its adoption. She now serves as the Co-Chair of the Climate Emergency Mobilization Workgroup. In her spare time, Barb loves to hike, run, read, travel, play table games and have friends over for dinner and conversation.

Kevin Sellner

(CEMWG co-chair, HWR sub-group member, liaison to ETB sub-group)


Kevin Sellner trained as a biological oceanographer and phytoplankton ecologist, Dr. Kevin Sellner focused his research career on phytoplankton dynamics and the fate of primary production in fresh and marine waters.  After retiring to Frederick in 2015, Kevin worked within Hood College’s Center for Coastal and Watershed Studies to monitor and advise local jurisdictions and HOAs on mitigating cyanobacteria blooms and water quality declines,  serves as a member of the Frederick County Sustainability Commission, is a member of the Interstate Technology and Regulatory Council’s Strategies for Preventing & Managing Harmful Cyanobacterial Blooms (HCBs) Team providing web guidance and options on mitigating freshwater cyanobacteria blooms, and frequently provides written comments and oral testimony to County and City officials on local water quality (2020 Monocacy River Water Quality Assessment), land use, and future conditions and options to respond to our changing climate.  For the latter interest, he has been asked to co-chair the current Climate Emergency Mobilization Workgroup in a year-long effort to provide recommendations to the City and County on options to reduce GHG emissions and implement practices and policies that will best adapt the area to the new climate we now face.

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