The Mission and Installation Contracting Command (MICC), Theater Support Center (TSC), is seeking proposals for Mission Support Services (MSS) at White Sands Missile Range (WSMR) in support of Army Test and Evaluation Command (ATEC). The services include Engineering, Technical, Maintenance, and Administrative support services, such as data collection and analysis, instrumentation development, modeling and simulation, research, assessment, and technical services. The contract will be awarded based on a Best Value Trade-Off Source Selection methodology, considering factors such as Mission Capability, Past Performance, Small Business Participation, and Cost/Price. • The NAICS Code for this RFP is 541330, Engineering Services, with a size standard of $47,000,000.00. • The Government will evaluate proposals using a trade-off between Mission Capability, Past Performance, Small Business Participation, and Cost/Price. • The contract will be a single Cost-Plus-Fixed-Fee (CPFF) type contract. • Invoicing shall be conducted in Wide Area Workflow (WAWF). • The requirement requires Cost Accounting Standards (CAS) coverage.