Professor Sklar also serves as Sustainable Energy Director of GWU's Environment & Energy Management Institute (EEMI), The George Washington University (GWU).

Professor Sklar also runs The Stella Group, Ltd.. a 21 year old global  a strategic technology optimization owner’s-rep firm for clean distributed energy users and companies which include advanced batteries and controls, energy efficiency and chp, fuel cells, geo-exchange, heat engines, mini generation (natural gas/propane), micro hydropower and water energy (freeflow, tidal, & wave, etc.),  modular biomass/biofuels, photovoltaics, small wind, and solar thermal (including daylighting, water heating, industrial preheat, building air-conditioning, and electric power generation). The Stella Group, Ltd. blends distributed energy technologies, aggregates financing (including leasing), with a focus on system standardization. He has projects on every continent the world over.

Prior to running his company and teaching at GWU, he worked for ten years as an energy and military aide to Senator Jacob K Javits (NY), three years as both Washington, DC and research director of the National Center for Appropriate Technology (NCAT) a federally-funded applied clean energy technical center, two years as Political Director for The Solar Lobby founded by the big-nine environmental groups. Thereafter he was Executive Director simultaneously of two renewable energy industry associations, the National BioEnergy Industries Association and the Solar Energy Industries Association in Washington, DC.

Professor Sklar routinely authors articles and is called on to present in webinars, and he has authored and coauthored many papers, including two with GWU faculty on community solar.