Rebecca Isacowitz

Ms. Rebecca Isacowitz is the Deputy Assistant Secretary of Defense for Energy Resilience & Optimization (DASD(ERO)) within the Office of the Assistant Secretary of Defense for Energy, Installations and Environment (ASD(EI&E)). In this position, she supports a team of talented professionals providing policy innovation, direction, and governance for programs and activities across the operational energy, climate resilience, and installation reliability spaces. A member of the Senior Executive Service, Ms. Isacowitz comes with over a decade of private sector, nonprofit, and government experience focused on the energy efficiency, resilience, and clean energy sectors.

She previously served as Chief of Staff for DOE's Office of Energy Efficiency and Renewable Energy (EERE) working to accelerate the research, development, demonstration, and deployment of technologies and solutions to equitably transition America to net-zero greenhouse gas emissions, economy-wide by no later than 2050 and ensure the clean energy economy benefits all Americans. As Deputy Secretary for Energy & Environment with the Executive Chamber for the State of New York, Rebecca supported the tactical development and operationalization of the State’s 14 energy and environmental agencies, and advanced Corporate Strategy initiates with the New York Power Authority in a directorship role.

Ms. Isacowitz also served in various government roles for the City of New York, most recently as Deputy Assistant Commissioner for the Department of Citywide Administrative Services’ Division of Energy Management. In that role she created and executed crosscutting projects to meet citywide goals on greenhouse gas emissions across 80+ city agency partners in 250M+ sq. ft. While with the City Parks Department she wrote and implemented energy, climate, resiliency, and emergency action plans for vulnerable areas across New York City, post Superstorm Sandy. Prior to her time in government, she held various positions including as a Sustainability and Energy Consultant, Analyst in the Wind Industry, and worked for the National Audubon Society.

Rebecca holds a Bachelor of Arts in International Relations and Spanish from Lehigh University, with a minor in Environmental Policy.