Grand Slam Diesel Services LLC

Grand Slam Diesel Services LLC, a minority-owned sole proprietorship based in Virginia Beach, Virginia, provides diesel engine repair, rebuilding, and maintenance services to the U.S. Coast Guard and Department of the Navy as a prime contractor (97% of recent awards) under total small business set-asides and full-and-open procedures. The vendor competes across both postures, with roughly half of recent awards designated Total Small Business Set-Aside and half competed without set-aside restrictions.

The U.S. Coast Guard dominates the customer base, accounting for 35 of 38 total awards (92% of recent activity) and $930 thousand of the $1.1 million combined potential value. The Department of the Navy's U.S. Fleet Forces Command (Atlantic) has placed two awards totaling $136 thousand for diesel engine rebuilds and engine-building support services. The Department of the Army Forces Command issued one award under the Army Watercraft Sustainment Maintenance—Zone 3 vehicle for emergency and unprogrammed repairs to Landing Craft Mechanized vessels. The two customer rankings align completely; Coast Guard work is the entire portfolio.

Concrete recent work spans narrow, high-frequency repair scopes tied to Coast Guard fleet readiness. Representative awards include a $104,250 full-and-open purchase order (September 2025) for open, inspection, and possible repair of 30 turbo assemblies (NSN 2950-01-590-4198) used on 45-foot Coast Guard small boats; a $105,300 full-and-open order (July 2025) for open, inspection, and repair of 27 cylinder heads for 6V92 diesel engines on 47-foot Motor Lifeboats; a $85,050 full-and-open order (August 2025) for cylinder head restoration on 27 6V92 engines; and a $76,875 full-and-open order (May 2025) for inspection and possible rebuild of 25 turbo assemblies. Smaller Total Small Business Set-Aside orders include a $41,750 order (August 2024) for 47-foot vessel repair, a $36,099 order (July 2024) for 6V92 engine repair, a $34,821 Total Small Business Set-Aside (April 2024) for 47-foot port diesel engine rebuild, and a $33,505 Total Small Business Set-Aside (December 2024) for cylinder liner replacement. The vendor also holds one sub-award from HII Fleet Support Group LLC dating October 2025 for emergency and unprogrammed repairs to Army Landing Craft Mechanized vessels (8525, 8551, and 8603).

Primary NAICS concentration is 336611 (Ship Building and Repairing), representing 30 of 38 awards, with secondary exposure in 811219 (Commercial and Industrial Machinery and Equipment—except Automotive and Electronic—Repair and Maintenance, 5 awards) and 336612 (Boat Building, 1 award). Primary PSC codes are 1780 (Maint/Repair/Rebuild of Equipment—Ship and Marine Equipment, 23 awards) and 1785 (Maint/Repair/Rebuild of Equipment—Ships, Small Craft, Pontoons, and Floating Docks, 7 awards), reflecting the diesel marine propulsion focus.

Activity has grown sharply: 11 awards in 2024, 22 in 2025, and 5 to date in 2026. Combined obligated dollars ($1.5 million) exceed combined potential value ($1.1 million) by 41 percent, indicating invoiced work has exceeded award ceiling estimates. The vendor sits on the Army Watercraft Sustainment Maintenance—Zone 3 vehicle. No named parent GWAC, BPA, or agency-wide IDIQ relationships appear in the source beyond that single Army vehicle placement.