The United States Department of Energy (DOE) was established in 1977, pulling together various energy-related agencies. Its mission is to promote energy security, advance scientific research, and address environmental challenges. Over the decades, DOE has played a vital role in shaping national energy policy and driving innovations in energy technology.
| 1977-1979 | James R. Schlesinger |
| 1979-1981 | Charles W. Duncan Jr. |
| 1981-1982 | James B. Edwards |
| 1982-1985 | Donald P. Hodel |
| 1985-1989 | John S. Herrington |
| 1989-1993 | Admiral James D. Watkins |
| 1993-1997 | Hazel R. O’Leary |
| 1997-1998 | Federico F. Peña |
| 1998-2001 | Bill Richardson |
| 2001-2005 | Spencer Abraham |
| 2005-2009 | Samuel W. Bodman |
| 2009-2013 | Steven Chu |
| 2013-2017 | Ernest Moniz |
| 2017-2019 | Rick Perry |
| 2019-2021 | Dan Brouillette |
| 2021-present | Jennifer M. Granholm |