Leidos has received a task order to continue to provide modelling and simulation support to the Defense Threat Reduction Agency (DTRA).
Valued at $17m, the task order was awarded under the combating weapons of mass destruction (CWMD) research and technology development contract.
Under the follow-on contract, Leidos will provide modelling and simulation support for web-based chemical, biological, radiological, nuclear and explosives (CBRNE) threats assessment tools.
Leidos president Mike Chagnon said: "Leidos is proud of the decades of support we have provided to DTRA's critical mission and we are honoured to have been selected to continue that support.
"The tools developed under this contract will provide US Government agencies and warfighters timely and actionable information that is critical to planning for and responding to CBRNE events throughout the world."
DTRA provides the US Department of Defense's (DoD) core intellectual, technical and operational support expertise for countering threats posed by weapons of mass destruction and high-yield explosives.
The web-based assessment tools are said to provide a mechanism for rapid collaboration between subject matter experts and will assist the DoD and US Government agencies in providing guidance for rapid response to CBRNE incidents.
The single-award cost-plus-fixed-fee task order comes with a one-year base period of performance, two one-year options.
Work under the contract will be carried out in San Diego, California, Fort Belvoir, Virginia, and Omaha, Nebraska.