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Under Secretary of Energy for Nuclear Security
S5
Seal of the U. S. Department of Energy
Incumbent Jill Hruby since July 26, 2021
United States Department of Energy
Style	Mr./Ms. Under Secretary
Member of	U. S. Department of Energy
Reports to	U. S. Deputy Secretary of Energy
Seat	Washington, D.C., United States
Appointer	The President with Senate advice and consent
Term length	Appointed
Formation	2000
First holder	John A. Gordon
Website	www.energy.gov

The Under Secretary for Nuclear Security, in the United States Department of Energy, is the Administrator for the National Nuclear Security Administration. The National Nuclear Security Administration's responsibilities include designing, producing, and maintaining safe, secure and reliable nuclear weapons for the U.S. military, providing safe, militarily effective naval nuclear propulsion plants, and promoting international nuclear safety and nonproliferation. The current Under Secretary is Jill Hruby.

The Under Secretary for Nuclear Security is appointed by the president and confirmed by the Senate. The Under Secretary is required to have extensive background in national security, organizational management, and appropriate technical fields. The Under Secretary is also a member of the Nuclear Weapons Council, and is the chair of the Council when a majority votes that the issue at hand is the primary concern of the Department of Energy. The Under Secretary is paid at level III of the Executive Schedule.

Officeholders

Under Secretary of Energy for Nuclear Security

Portrait	Name	Tenure	President(s) served under
	John A. Gordon	2000–2002	Bill Clinton George W. Bush
	Linton Brooks	2002–2006	George W. Bush
	Tom D'Agostino	2007–2014	George W. Bush Barack Obama
	Frank Klotz	2014–2018	Barack Obama Donald Trump
	Lisa Gordon-Hagerty	2018–2020	Donald Trump
	William Bookless (acting)	2020–2021
	Charles P. Verdon (acting)	2021	Joe Biden
	Jill Hruby	2021

References

1. "Jill Hruby". Energy.gov.
2. "US CODE: Title 42,7132. Principal officers". Retrieved September 24, 2007.
3. "US CODE: Title 10,179. Nuclear Weapons Council". Retrieved September 24, 2007.
4. "NNSA Established | National Nuclear Security Administration". Nnsa.energy.gov. Retrieved 12 April 2014.
5. "Amb. Linton Brooks Sworn in as NNSA Administrator | National Nuclear Security Administration". Nnsa.energy.gov. Retrieved 12 April 2014.
6. "NNSA Administrator to Depart | Department of Energy". Cms.doe.gov. 2007-01-04. Retrieved 12 April 2014.
7. "Thomas P. D'Agostino | Department of Energy". energy.gov. Retrieved 26 Feb 2018.
8. "Thomas D'Agostino, NNSA Head, Stepping Down". Huffingtonpost.com. 21 December 2012. Retrieved 12 April 2014.
9. "Lieutenant General Frank G. Klotz, USAF (Ret), Confirmed as Energy Department Under Secretary for Nuclear Security and Administrator for the National Nuclear Security Administration". National Nuclear Security Administration. Archived from the original on November 8, 2014. Retrieved April 11, 2014.
10. "DOE Bids Farewell to NNSA's Klotz". U.S. Department of Energy. Retrieved January 30, 2018.
11. "Lisa Gordon-Hagerty Confirmed as Energy Department Under Secretary for Nuclear Security and Administrator for the National Nuclear Security Administration". National Nuclear Security Administration. November 6, 2020. Retrieved November 6, 2020.
12. ^ "Lisa E. Gordon-Hagerty Resigns as NNSA Administrator - Dr. William Bookless Now Serving as Acting NNSA Administrator". National Nuclear Security Administration. November 6, 2020. Retrieved November 6, 2020.
13. "Head of nuclear weapons agency unexpectedly resigns". Defense News. November 6, 2020. Retrieved November 6, 2020.
14. "Dr. Charles Verdon". Energy.gov.

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