Summary
The Defense Threat Reduction Agency (DTRA) is issuing a federal solicitation for operations and maintenance of the US segment of the International Monitoring System (IMS) radionuclide monitoring stations, which support detection of worldwide nuclear weapons tests as part of the Comprehensive Nuclear-Test-Ban Treaty verification regime. This contract sustains the network of 11 US IMS radionuclide monitoring stations under the Nuclear Arms Control Technologies (NACT) Program, requiring unique and highly specialized engineering capabilities. The solicitation was issued July 2, 2026 with proposals due August 3, 2026, and is being conducted as a competitive federal procurement (not a grant).