Western Branch Diesel, LLC

Western Branch Diesel, LLC, a for-profit limited liability company headquartered in Portsmouth, Virginia, supplies and services marine diesel engines, generators, and related equipment to federal maritime agencies as a prime contractor, competing predominantly under full-and-open solicitations with no material set-aside footprint. The vendor holds self-certified Small Disadvantaged Business status across multiple subsidiary entities but does not anchor its prime federal work to SBA set-asides; 755 prime awards over the past several years carry no set-aside designation.

Customer concentration is extreme and durable: the U.S. Coast Guard accounts for 191 awards (25% of the total) and $88.5 million (70% of combined potential value), followed by the Department of the Navy Naval Facilities Engineering Command with 170 awards and $13.5 million, and Naval Sea Systems Command with 47 awards and $13.2 million. Together, these three customers represent 408 awards (54% of the total) and $115.2 million (91% of combined potential value). The vendor's entire federal footprint is maritime—Coast Guard, Navy, Naval Facilities Engineering Command, Naval Sea Systems Command, and the National Oceanic and Atmospheric Administration—with no material civilian or land-based defense exposure.

Western Branch Diesel's capability portfolio is tightly scoped to marine propulsion and generation. Award detail shows three dominant work streams: overhaul and remanufacturing of MTU 60 series and Detroit Diesel 6V92 series marine engines for Coast Guard vessels; generator rental and procurement to support Navy submarine squadrons and facilities (particularly Norfolk and Fleet, Virginia); and on-demand engine repair, technical services, and parts supply. Representative prime awards include a $26.1 million indefinite delivery contract (awarded March 2024, ultimate completion February 2030) with the Coast Guard for MTU 60 series engine overhaul and reduction gear work; a $2.5 million Coast Guard delivery order (February 2025) for open inspection and reporting of engine mandatory parts; a $2.2 million Coast Guard delivery order (May 2024) for overhaul of 18 port and starboard engines; a $830,568 Coast Guard delivery order (July 2022) for remanufacturing of 10 Series 60 engines; a $421,670 Naval Facilities Engineering Command purchase order (August 2025) for five diesel generators (1,000 kilowatts or greater) to support Naval Station Norfolk; and a $665,000 blanket purchase agreement (October 2023, ultimate completion September 2028) with Naval Sea Systems Command for on-demand marine diesel engine, transmission, and generator sales and technical support. Work is performed primarily in Portsmouth, Virginia, with field service at multiple Coast Guard stations and Navy facilities.

The vendor operates through five recurring parent vehicles: an indefinite delivery contract (HSCG4004D60038) generating 137 task orders and $5.5 million combined potential value; a blanket purchase agreement (N4008514A8172) with 72 task orders and $4 million; an older engine overhaul IDC (2010–2015) carrying 62 task orders and $2.6 million; and two additional BPAs and an expired remanufacturing vehicle. The vehicle footprint reinforces Coast Guard and Navy reliance—all top vehicles are Coast Guard or Navy issued, and the largest four vehicles represent work that is engine-centric or generator rental.

Activity has declined materially over the past two years. The vendor received 20 awards in 2022, 21 in 2023, 11 in 2024, 8 in 2025, and 4 in the first half of 2026—a 70% drop from the 2023 peak. Combined potential value across all 755 awards is $127.1 million, with $38.4 million obligated (30% of potential). Only 2 awards with a combined potential value of $68 thousand face ultimate completion within the next 24 months, indicating minimal recompete pressure near term but a sustained absence of new work intake.

SCI-reported federal service contract invoicing totals $1.2 million across FY2022–FY2025, concentrated in FY2022 ($1 million) with minimal FY2024 activity ($117 thousand). The SCI dataset captures only service contracts above the $150,000 threshold and excludes goods procurement and generator rentals, which dominate Western Branch Diesel's award base; SCI figures are therefore a small subset of the vendor's actual federal revenue. The vendor delivered roughly 0.7 FTEs in FY2022 and 0.3 FTEs in FY2024 on captured service contracts, with no subcontractor engagement. Government-paid rates on SCI-reportable work ran from $257/hr (10th percentile) to $687/hr (90th percentile), with a median of $613/hr—reflecting a mix of technical labor and field service roles.

Western Branch Diesel operates as a pure prime contractor (100% of awards) with no subcontractor footprint in the federal award record. The vendor does not sub to larger primes and maintains internal delivery capability for all work. Corporate structure shows multiple subsidiary entities, all named Western Branch Diesel or variants thereof, all for-profit, and spanning both limited liability company and Subchapter S corporation forms; one subsidiary carries self-certified Small Disadvantaged Business status, though this designation has not materially influenced the vendor's prime-contract set-aside posture.

The award portfolio reflects a specialized maritime diesel and generator services provider with durable, high-concentration relationships within Coast Guard and Navy maritime operations, declining recent award velocity, minimal new work intake, and no material near-term recompete exposure. Competitive entry and partnership opportunity lie primarily with Coast Guard and Navy supply and facilities organizations already familiar with the vendor's engine and generator services.