The Raytheon Co., Aberdeen Proving Ground, Maryland, has been awarded a $21,186,712 firm-fixed-price, cost-plus-fixed-fee, and time-and-materials contract to retrofit the F-15 fleet. This contract provides for retrofitting the F-15 fleets current Identify Friend of Foe units, which provides Mode 5 capability for the APX-114 and APX-119 on the F-15 models C/D/E via a hardware retrofit and software upgrade. These units also provide National Security Agency approved cryptography and robust anti-jam interrogation and reply encryption capabilities. Work will be performed at Aberdeen Proving Grounds, Maryland; and Largo, Florida, and is expected to be complete by August 2022. Fiscal 2018 and 2019 procurement funds in the full amount are being obligated at the time of award. This award is the result of a sole-source acquisition. Air Force Life Cycle Management Center, Wright-Patterson Air Force Base, Ohio, is the contracting activity (FA8634-19-C-2700).