This project requires a contractor to design and build facilities and infrastructure for the Relay Ground Station South (RGS-S) at Shriever Space Force Base, Colorado Springs, CO, using a Design-Build delivery method. The work includes concrete pads, antenna foundations, utilities, backup generators, fuel tanks, pathways, and shelters. Access to controlled unclassified information (CUI) is restricted, requiring vendors to be registered in SAM.gov and PIEE with a current BASIC confidence level in SPRS. Contractors must also comply with CMMC Level 2 (Self) requirements for systems processing Federal Contract Information or CUI. No budget amounts or submission timelines are specified in this description.