Chief Counsel of the Energy Program at Environmental Defense Fund (EDF) and leads EDF’s natural gas efforts.

Prior to joining EDF, Mark was Director of Enterprise Strategy for Public Service Enterprise Group (PSEG), where he worked directly with PSEG’s senior leadership in crafting and implementing the corporation’s business strategy.

Aside from PSEG, Mark’s career includes time as an attorney in a private environmental practice, a regulator with the New Jersey Department of Environmental Protection, and an aide to then-Congressman Robert G. Torricelli (D–NJ).