As the co-founder of Plug in America, Marc Geller is an advocate and writer in the area of public and corporate policy related to electric vehicles, plug-in hybrids, and related source energy. Plug-In America is a coalition of electric cars who are advocates of energy independence and clean air. Geller is also the San Francisco Bay Area sales representative of Sustainable Solutions Partners, an installer of solar energy systems, efficient lighting and appliance retrofits, and electric vehicle chargers among other things.

He is on the board of directors of the Electric Auto Association and co-founded the association's San Francisco chapter, the San Francisco Electric Vehicle Association, as well as DontCrush.com.