Johns Hopkins University Applied Physics Laboratory LLC, Laurel, Maryland, has been awarded a ceiling of $18,338,306 modification P00004 to previously awarded contract FA8819-18-D-0009 for the National Space Test and Training Complex support. This modification brings the total cumulative face value of the contract to $24,944,536 from $6,606,229. Work will be performed at Los Angeles Air Force Base and is expected to be completed by May 10, 2025. Fiscal 2023 research, development, test and evaluation funds in the amount of $4,000,000 are being obligated at time of award. The Space Systems Command, Los Angeles AFB, California, is the contracting activity. (Awarded May 10, 2023)