The under secretary of energy oversees the department's energy and environment programs. The under secretary plays an instrumental role in the development of energy related research and development necessary to meet the United States' growing energy need and work to advance the nations energy and electricity security.
The under secretary of energy is appointed by the president with the advice and consent of the Senate. The current acting under secretary is Alex Fitzsimmons, who was appointed when Preston Wells Griffith III, who was sworn in on July 10, 2025, was removed on October 20, 2025. Kyle Haustveit was sworn as under secretary in May 2026.
List of under secretaries PortraitUnder secretaryTook officeLeft office1Robert G. CardJune 5, 200120042David K. GarmanJune 15, 2005February 2007actingDennis SpurgeonMay 2007July 20073Clarence H. AlbrightAugust 3, 2007January 20, 20094Kristina M. JohnsonMay 2009October 2010actingCathy ZoiDecember 20102011actingDavid B. SandalowJune 2012January 20, 20135Mark MenezesNovember 6, 2017August 4, 2020acting Kathleen HoganJuly 2022June 13, 20236David W. CraneJune 14, 2023January 20, 2025acting Kathleen HoganJanuary 20, 2025July 10, 20257Preston Wells Griffith IIIJuly 10, 2025October 20, 2025actingAlex FitzsimmonsOctober 20, 2025May 22, 20268Kyle HaustveitMay 22, 2026Present
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