L3Harris Interstate Electronics Corp. (L3-IEC), Anaheim, California, is awarded a cost-plus-fixed-fee $15,141,987 modification (P00023) to a previously awarded contract (N00003022C2001) for TRIDENT II (D5) Flight Test Instrumentation systems support. This contract award also benefits a foreign military sale to the United Kingdom. Work will be performed in Anaheim, California (56%); Cape Canaveral, Florida (30%); Washington, D.C. (7%); Barrow-in-Furness, United Kingdom (3%); Kings Bay, Georgia (2%); Bremerton, Washington (1%); and Silverdale, Washington (1%). Work is expected to be completed by Feb. 8, 2027. Fiscal 2024 shipbuilding and conversion procurement (Navy) funds in the amount of $5,177,468, fiscal 2024 other procurement (Navy) funds in the amount of $599,666; and fiscal 2024 weapons procurement (Navy) funds in the amount of $502,216, are being obligated at time of award. No Funds will expire at the end of the current fiscal year. The total dollar value of the modification, including options, is $15,141,987 and the total cumulative face value of the contract is $335,161,461. This contract is being awarded on a sole source basis under 10 U.S. Code 3204(a)(1) and was previously synopsized on the System for Award Management online portal. Strategic Systems Programs, Washington, D.C., is the contracting activity.