The Department of Defense, specifically the Department of the Navy through NAVSUP Weapon Systems Support, is seeking proposals for the repair and modification of diesel engines, identified by NSN 7R-2815-124117665-SX, with a quantity of four units required. This procurement is critical for maintaining operational readiness and reliability of naval equipment, as diesel engines are essential components in various military applications. Interested parties are encouraged to submit their proposals or capability statements within 45 days of this notice, with the understanding that the government intends to negotiate with only one source under FAR 6.302-1. For further inquiries, potential bidders can contact Andrew N. Phillips at (215) 697-5047 or via email at ANDREW.N.PHILLIPS10.CIV@US.NAVY.MIL.