Mary Sotos is the Director of the Federal Energy Management Program (FEMP). She leads a team dedicated to helping federal agencies achieve sustainable facilities and fleets by assisting with federal-wide data collection and aggregation, developing reporting tools and technical assistance, and offering training and project funding.

Sotos previously served as a senior policy advisor with the Connecticut Department of Energy and Environmental Protection, where she launched a revamped "Lead By Example" program to create new strategies to track and manage greenhouse gas emissions, waste, and water use across all state agencies. She also served as the agency's deputy commissioner for energy, directing the state's energy policies and programs. Sotos also worked at the Greenhouse Gas Protocol Program at the World Resources Institute, an international think tank, where she developed new global carbon accounting standards and tools used by thousands of organizations worldwide. Additionally, she partnered with corporate leaders to develop and advance new renewable energy strategies, tools, and policies to decarbonize the grid.

She holds a Bachelor of Arts in Environmental Studies from St. Olaf College and completed a Fulbright Fellowship in Brussels, Belgium.