Assistant Secretary of Energy for Nuclear Energy of Office of Nuclear Energy
Incumbent Theodore J. Garrish since September 26, 2025
United States Department of Energy
Reports to	Under Secretary of Energy for Science and Innovation
Appointer	President of the United States
Formation	April 3, 2006
First holder	Dennis Spurgeon

TheOffice of Nuclear Energy (NE) is an agency of theUnited States Department of Energy which promotesnuclear power as a resource capable of meeting the energy, environmental, and national security needs of the United States by resolving technical and regulatory barriers through research, development, and demonstration.

The Office is led by the Assistant Secretary of Energy for Nuclear Energy, who is appointed by thePresident of the United States with the advice and consent of theUnited States Senate. The current acting Assistant Secretary of Energy for Nuclear Energy is Michael Goff.^[1]

The Office of Nuclear Energy is guided by the following four research objectives detailed in its Nuclear Energy Research and Development Roadmap:^[2][3]

• Develop technologies and other solutions that can improve the reliability, sustain the safety and extend the life of current reactors.
• Develop improvements in the affordability of new reactors to enable nuclear energy to help meet the Administration's energy security and climate change goals.
• Develop sustainable fuel cycles.
• Understand and minimize the risks of nuclear proliferation and terrorism.

The Office is under the general supervision of theUnder Secretary of Energy for Science and Innovation. It is administered by the Assistant Secretary of Energy for Nuclear Energy (NE-1), who is appointed by thePresident of the United States. The Assistant Secretary is supported in running the Office by a Principal Deputy Assistant Secretary and five career Deputy Assistant Secretaries. Each of the five Deputy Assistant Secretaries oversee a different branch of the Office's work. As of 2022, staffing and organization was as follows:^[1]

• Assistant Secretary
  • Principal Deputy Assistant Secretary
    • Deputy Assistant Secretary – Nuclear Infrastructure Programs - Tracey Bishop
    • Deputy Assistant Secretary – Spent Fuel and Waste Disposition - Paul Murray
    • Deputy Assistant Secretary – Nuclear Fuel Cycle and Supply Chain - Dr. Jon Carmack
    • Deputy Assistant Secretary – International Nuclear Energy Policy and Cooperation - Aleshia Duncan
    • Deputy Assistant Secretary – Reactor Fleet and Advanced Reactor Deployment - Alice Caponiti

The Office of Nuclear Energy is the landlord of theIdaho National Laboratory (INL). INL is in southern Idaho, just west of the Eastern Snake River Plain. It occupies 890 square miles (2,300 km²) of desert and is about 42 miles (68 km) from Idaho Falls.

INL is an applied engineering laboratory dedicated to supporting the U.S. Department of Energy's research of nuclear energy, national and homeland security, and clean energy. Past and current work includes initial development of: nuclear reactor designs, prototype reactors for the U.S. Navy, and technologies to manage nuclear waste. INL also conducts research supporting fuel cycle development, as well nuclear energy demos and deployments.

INL was established in 1949 as the "National Reactor Testing Station" by theAtomic Energy Commission. It is the location of historic Experimental Breeder Reactor Number I (EBR-I), which was the first nuclear reactor to generate usable electrical power.

TheConsortium for Advanced Simulation of Light Water Reactors (CASL) was established in July 2010 as the first of five Department of Energy Innovation Hubs.^[4][5] It was administered by the Office of Nuclear Energy, and coordinated byOak Ridge National Lab and INL.^[6] CASL had one goal: To develop a simulation environment that modeled the operation of an entire reactor down to the characteristics of a single fuel rod (which significantly exceeded the resolution available with existing industry tools). This simulation environment was named the Virtual Reactor. The Virtual Reactor was designed and built to provide solutions to a wide variety of reactor performance challenges.^[7]

In order to develop what was eventually called the Virtual Environment for Reactor Applications (VERA), it was necessary for CASL to conduct both basic research and technology development.^[8] Work of such scope and complexity was accomplished through a partnership of U.S. government, academia, and industry.^[4] In 2020, the CASL project concluded, making VERA available for licensing and deployment by the nuclear industry.^[9][10]

TheAssistant Secretary of Energy for Nuclear Energy is the head of the Office of Nuclear Energy. The assistant secretary is responsible for a budget of $1.626 billion as of fiscal year 2021.

Parties

  Democratic  Republican

Status

  Acting Assistant Secretary of Energy for Nuclear Energy

No.	Portrait	Name	Took office	Left office	Refs.	President(s)
1		George W. Cunningham	1979	1981	[11]		Jimmy Carter
2		Shelby Brewer	1981	1984	[12]		Ronald Reagan
acting		James W. Vaughan, Jr.	1984	1986
3		A. David Rossin	1986	1987	[13]
4		Theodore J. Garrish	1987	1989	[14]
5		William H. Young	1989	1993	[15]		George H. W. Bush
6							Bill Clinton
7		William D. Magwood, IV[a]	November 10, 1998	2005	[16][17][18][19]
acting		R. Shane Johnson	May 2005	April 3, 2006	[20]		George W. Bush
8		Dennis Spurgeon	April 4, 2006	January 2009	[21][22]
9		Pete Miller	August 2009	November 2010	[23][24]		Barack Obama
acting		Peter Lyons	November 2010	April 14, 2011
10			April 14, 2011	June 30, 2015	[25][26][27][28][29]
acting		John Kotek	July 1, 2015	January 20, 2017	[30][31][32]
acting		Raymond Furstenau	January 20, 2017	May 31, 2017	[33][34]		Donald Trump
acting		Edward McGinnis	May 31, 2017	July 10, 2019	[35][36]
11		Rita Baranwal	July 11, 2019	January 8, 2021	[37][38]
acting		Dennis Michael Miotla	January 8, 2021	May 10, 2021			Joe Biden
acting		Kathryn Huff	May 10, 2021	January 19, 2022	[39]
acting		Andrew Griffith	January 19, 2022	May 11, 2022	[40]
12		Kathryn Huff	May 11, 2022	May 3, 2024	[41][42][43]
acting		Michael Goff	May 3, 2024	September 26, 2025	[44]
13		Theodore J. Garrish	September 26, 2025	Present			Donald Trump

Table notes:

• Advanced Fuel Cycle Initiative
• High-temperature electrolysis

• Governmental nuclear organizations
• Nuclear power in the United States
• Nuclear history of the United States
• United States Department of Energy agencies

• Articles with short description
• Short description matches Wikidata
• Use mdy dates from August 2019
• Articles with hCards
• Government agencies with year of establishment missing