Serco Inc., Herndon, Virginia, has been awarded a $9,148,556 option modification (P00035) to a previously awarded contract (FA2517-20-C-0003) for the ground-based, electro-optical deep space surveillance system. The modification brings the total cumulative face value of the contract to $49,580,565 from $40,432,008. Work will be performed at Socorro, New Mexico; Diego Garcia, British Indian Ocean Territory; and Maui, Hawaii, and is expected to be completed by April 30, 2026. Fiscal 2025 operation and maintenance funds in the amount of $9,148,556 are being obligated at time of award. The Space Acquisition and Integration Office, Peterson Space Force Base, Colorado, is the contracting activity.