This requirement is to provide Engineering Services (ES) in support of the Longbow HELLFIRE (LB/HF) AGM-114L Air-to-Surface missile program for FY 19 through FY 21. The ES consist of program management, engineering, product assurance, logistics, configuration management, test/evaluation, and production engineering support required to maintain the capability of the Longbow HELLFIRE missile. Anticipated contract and option types are Cost-Plus-Fixed-Fee. These services provide general system support, not duplication tasks performed in development of other on-going contracts. The FY 19 Base Year and Options for FY 20 and FY 21 each consist of 50,000 hours, respectively.