The Department of Defense, specifically the Department of the Navy through NAVSUP Weapon Systems Support, is seeking a sole source procurement for the repair and modification of infrared receivers, identified by NSN 7R-5865-016115555-EX, with a quantity of 28 units required. This procurement is critical for maintaining electronic countermeasures and quick reaction capability equipment, which play a vital role in defense operations. The government intends to negotiate exclusively with Northrop Grumman, as they anticipate receiving a single acceptable offer; however, other interested parties may express their capabilities to the primary contact, Shannon M. Gonglik, at Shannon.Gonglik@navy.mil. Proposals must be submitted within 45 days of this notice, and the government reserves the right to determine whether to conduct a competitive procurement based on the responses received.