Stewart & Stevenson Fdda LLC

Stewart & Stevenson Fdda LLC, doing business as Florida Detroit Diesel-Allison, supplies marine diesel engine components, overhaul services, and parts procurement for the U.S. Coast Guard and Defense Logistics Agency as a prime contractor on a 100% prime footprint with no subcontractor activity. The Fort Lauderdale, Florida-based company is a child entity of Stewart & Stevenson Power Products LLC, a manufacturer and power solutions provider headquartered in Houston, Texas.

The vendor's federal work concentrates on marine propulsion and auxiliary engine maintenance for Coast Guard cutters and patrol craft, with particular specialization in MTU and Rolls-Royce Solutions diesel engines and components. Recent representative prime awards include a $191,263 Coast Guard purchase order (April 2025) for inspection and overhaul of sixty Rolls-Royce Solutions diesel cylinder heads for Medium Endurance Product Line vessels, a $275,036.75 Total Small Business set-aside (September 2024) for Rolls-Royce branded parts including LCD modules, fluid filters, and supercharger kits for small boats, and an $111,534.42 Total Small Business set-aside (December 2025) for MTU marine diesel engine parts delivered to Curtis Bay, Maryland. The company also holds an $8 million Indefinite Delivery Contract (awarded May 2022, ultimate completion May 2025) with the Coast Guard for overhaul of MTU 20V4000M93L main diesel engines used on 154-foot Fast Response Cutters, encompassing labor, materials, storage, inspection, testing, and packaging at OEM-authorized facilities.

Customer concentration is extreme. The Department of Homeland Security U.S. Coast Guard accounts for 558 awards (47% of 1,176 total prime awards) valued at $78.4 million (72% of combined potential value). The Defense Logistics Agency Land and Maritime ranks second with 391 awards at $8.5 million combined potential value, followed by the Army Materiel Command Contracting Command Detroit Arsenal (25 awards, $7 million) and DLA Aviation (94 awards, $3.1 million). Together, these four customers account for 93% of award count and 89% of combined potential dollars. The vendor serves 26 distinct customer agencies across the federal government but operates as a Coast Guard-centric supplier.

Vehicle positioning reflects the Coast Guard's maintenance scheduling. The vendor places 274 task orders under Indefinite Delivery Contract HSCG4011D11005 ($16.5 million combined potential value), 69 task orders under HSCG8013DPFR821 ($6.8 million), and 64 task orders under 70Z08019D13001B00 ($6.1 million). A single-award IDV for MTU engine overhauls anchors strategic capacity, while transactional purchase orders for components and repair services flow through recurring DLA supply contracts.

Activity has remained stable at three to seven awards annually over the past five years, with 1,176 total prime awards recorded since 2006. Only two awards (combined potential value $172 thousand) reach ultimate completion within the next twenty-four months, indicating minimal near-term recompete exposure and a mature, long-standing customer relationship with the Coast Guard. The vendor's award portfolio skews toward goods procurement and maintenance labor on marine equipment; top NAICS categories include Transportation Equipment and Supplies Merchant Wholesalers (275 awards), Other Engine Equipment Manufacturing (188 awards), and Ship Building and Repairing (104 awards). Top PSC coding reflects the maritime focus: Maintenance/Repair/Rebuild of Ship and Marine Equipment (154 awards), Vehicular Power Transmission Components (101 awards), and Diesel Engines and Components (87 awards). SCI reporting shows minimal service-contract engagement (four subcontractor records, 3.3 FTEs in FY2024), consistent with a goods-and-labor-intensive parts and overhaul business model rather than managed-services delivery.

The vendor competes predominantly full-and-open, with two Total Small Business set-aside awards visible in recent activity but no recurrent small business designation. Authorized distributor status for Allison Transmissions, Detroit Diesel, MTU, and Mercedes engines positions the vendor as a supply-chain node for OEM marine propulsion components and maintenance services rather than as a systems integrator or managed-service provider.