Western Branch Diesel LLC

Western Branch Diesel LLC, a limited liability company and self-certified small disadvantaged business headquartered in North Charleston, South Carolina, supplies Volvo Penta original equipment manufacturer (OEM) marine engine components to the U.S. Coast Guard as a prime contractor (50% of recent awards) and as a subcontractor to defense primes. The vendor operates primarily under Total Small Business and full-and-open set-aside categories on procurement values under $38,000.

Western Branch's federal footprint is narrow and nascent. The vendor has secured four awards totaling $73,000 in combined potential value over the past thirty months, split evenly between prime purchase orders from the Coast Guard and sub-awards under Navy contracts. Both prime awards originate from the Coast Guard Surface Forces Logistics Center and cover Volvo Penta engine maintenance and repair components — a May 2026 $35,390.25 purchase order (designated Total Small Business set-aside) for 10 turbosuperchargers and 5 exhaust bellows kits, and a September 2025 $37,703.70 full-and-open purchase order for corrosion preventive anodes, fuel injection nozzles, seals, and flexible shaft assembly cores. Both orders were brand-name sole-source procurements limited to Volvo Penta of the Americas, Inc. due to mission-critical safety requirements and absence of equivalent non-OEM alternatives. Work is performed at the Coast Guard facility in Curtis Bay, Baltimore, Maryland. The vendor's two sub-awards (both from QED Systems, Inc. under the Watercraft Industrial Support parent vehicle) relate to generator procurement and installation work for Navy maritime platforms, awarded in February and March 2024. Western Branch competes in the marine diesel engine parts supply space; its customer base is currently confined to the Coast Guard and Navy, with no visible expansion into other federal agencies or platform types. The vendor's award volume has averaged one award per year since 2024.