Leadership

Andrew Mayock

On February 9, 2021, President Biden appointed Andrew Mayock to serve as the Federal Chief Sustainability Officer. As the Federal Chief Sustainability Officer, Andrew Mayock leads President Biden's efforts to improve the sustainability of the Federal government, including by helping Federal agencies prepare for and respond to the impacts of climate change on their operations and services.

Andrew brings over 25 years of public and private sector experience to the Biden Administration, including service in the Obama and Clinton Administrations. In the Obama Administration, Andrew served as Deputy Director for Management and Associate Director for General Government Programs at the Office of Management and Budget (OMB). At OMB, he led OMB's management offices and the President's Management Council with a focus on digital services, cybersecurity, acquisitions, financial management, personnel and performance management. As Associate Director for General Government Programs, he oversaw policy and budget for six cabinet agencies comprising $225 billion of the President's budget and covering over one million federal employees.

Prior to his OMB roles, Andrew served as the Deputy Vice President for Compact Operations for East and Southern Africa at the Millennium Challenge Corporation. He served as Executive Secretary at the U.S. Treasury Department from 2009-2010.

In the Clinton Administration from 1995-2000, Andrew worked at the White House and the U.S. Treasury Department. Andrew was a consultant at Booz Allen Hamilton from 2003-2009 and McKinsey & Company from 2017-2020, where he focused on public sector programs.

During 2019–2020, Andrew served on the steering committee of the Climate 21 Project, which delivered advice for a coordinated, rapid-start, whole-of-government climate response.

Andrew received a bachelor's degree from the University of Illinois, law degree from The George Washington University Law School, and a master in public administration from the Kennedy School of Government at Harvard University.

He and his wife have two children and reside in Washington, D.C.

Dee Siegel

Dee Siegel is a Deputy Chief Sustainability Officer with the Office of the Federal Chief Sustainability Officer, which is a part of the White House Council on Environmental Quality (CEQ). In this role, Dee designs strategies, develops policies, and oversees execution of programs to achieve greater sustainability in Federal operations and meet the President's climate goals.

Dee brings more than 18 years of experience developing and executing sustainability strategies and programs in the public and private sectors. Prior to joining the Federal government during the Obama Administration, Dee consulted with clients in the aerospace, energy, consumer products, and food and beverage industries on environmental strategy, strategic partnerships, and communications.

Dee began her career in international development, managing programs to promote sustainable agriculture, environmental conservation, and economic development in Central America, the Caribbean, and the Pacific, and advising communities on agriculture in Guatemala as a Peace Corps volunteer.

Madeline Reeves

Madeline (Maddi) Reeves is a Deputy Chief Sustainability Officer with the Office of the Federal Chief Sustainability Officer, which is a part of CEQ. In this role, she works across the White House, the Federal government, and industry on sustainability topics ranging from low-embodied carbon construction materials to clean electricity.

Prior to joining CEQ, Maddi served as a Presidential Management Fellow at the U.S. Department of State, where she focused on public-private partnerships for clean energy and international climate finance. Before joining the Federal government, Maddi spent time at a venture capital fund focused on clean technologies, at the Bill & Melinda Gates Foundation as part of its strategy team, and as a management consultant.

Maddi holds a master's degree in public policy from Harvard University, a master's degree in business administration from Northwestern University, and a bachelor's degree from the University of Michigan.