CACI NSS Inc., Colorado Springs, Colorado, was awarded a $9,586,575 modification (P00254) to previously awarded contract FA8823-16-C-0004 for the Satellite Control Network (SCN). This contract modification provides for Phase 3 of the Air Force Satellite Control Network (AFSCN) Radio Frequency Interference (RFI) Monitoring System (ARMS) deploying to the U.S., U.S. territories, and outside the U.S. It replaces the existing Air Force Satellite Control Network Link Protection System, which is being decommissioned concurrently as the ARMS solution is deployed at each site. Work will be performed in the U.S., U.S. territories, and outside the U.S. The period of performance will be 16 months from contract award. Fiscal 2022 procurement funding in the amount of $1,124,459, Fiscal 2021 spectrum relocation funds (SRF) in the amount of $2,082,753; and fiscal 2022 SRF in the amount of $2,210,000 are being obligated at the time of modification award. The total cumulative face value of the contract is $565,309,687. Space Systems Command, Peterson Space Force Base, Colorado, is the contracting activity.