The Department of Defense, through the Naval Surface Warfare Center (NSWC) Indian Head Division, is seeking to award a Firm-Fixed Price contract for the maintenance and support services of Mobile Chemical Agent Detector (MCAD) systems. The contractor will be responsible for troubleshooting, repair, and testing of MCAD equipment, including technical support, software installation, periodic system checks, and sensor upgrades, ensuring the operational readiness of the equipment. This contract is being pursued on a sole source basis with MESH, Inc., the original equipment manufacturer, due to the proprietary nature of the technology involved. Interested parties must submit their responses by December 30, 2025, at 4:00 PM to the designated contacts, Jessica Quell and Devon Gormley, via the provided email addresses.