The U.S. Army Technical Center for Explosives Safety requires professional engineering services to update and modernize its proprietary HazX software, including resolving defects, overhauling the user interface, integrating new analytical features, and updating documentation. Performance is anticipated from award through September 30, 2027. ARCTOS Technology Solutions, LLC is the sole developer and IP owner, with no licensed third parties, making it the only known source capable. This is a notice of intent to sole source, not a competitive solicitation, and the government will issue a request for proposal directly to ARCTOS. Other responsible sources may submit a capability statement demonstrating their technical expertise and legal authorization to modify the software.