Amentum Team Awarded $28 Billion Y-12 National Security Complex and Pantex Plant Management Contract

GERMANTOWN, Md.–(BUSINESS WIRE)–#AmentumWin–Amentum, a leading contractor of the U.S. Department of Energy (DOE), announced today that Nuclear Production One, LLC, (NPOne), a joint venture between Amentum and Fluor, has been awarded the contract to manage and operate the Y-12 National Security Complex and the Pantex Plant in Tennessee and Texas, respectively.

NPOne will be responsible for performing all necessary operational and management functions required to support the National Nuclear Security Administration (NNSA) at the two sites within the Nuclear Security Enterprise. The performance-based, cost-plus-award-fee contract has a maximum value of $28 billion over a five-year base and five one-year option performance periods. The estimated value of the contract is $2.8 billion annually and includes a four-month transition period starting in December 2021.

In addition to providing the functional capabilities to meet the requirements of NNSA’s Stockpile Stewardship and Management Program, NPOne will support NNSA’s Offices of Naval Reactors; Emergency Operations; Safety, Infrastructure and Operations; Defense Nuclear Security; Counterterrorism and Counterproliferation; and Defense Nuclear Nonproliferation, as well as other Department of Energy offices and Government agencies.

John Vollmer, Chief Executive Officer of Amentum, said, “We are extremely pleased to have been awarded this contract. This award is a major milestone for Amentum and enables us to expand our role in maintaining a strategic deterrent to keep the U.S. and our allies safe. Amentum is committed to delivering our expertise in support of this critical NNSA mission.”

“Our NPOne team is unmatched in managing complex nuclear facilities and will bring our best capabilities together to accomplish the mission safely and effectively in support of the Nuclear Security Enterprise,” said Mark Whitney, President of Amentum’s Nuclear & Environment Business Unit. We are honored to be a part of this team and to begin working with the employees at Y-12 and Pantex under this new contract.”

About Amentum

Amentum is a premier global technical and engineering services partner supporting critical programs of national significance across defense, security, intelligence, energy, and environment. We draw from a century-old heritage of operational excellence, mission focus, and successful execution underpinned by a strong culture of safety and ethics. Headquartered in Germantown, Maryland, we employ more than 34,000 people in all 50 states and perform work in 105 foreign countries and territories. Visit us at to explore how we deliver excellence for our customers’ most vital missions.


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