Marine Hydraulics International, LLC

Marine Hydraulics International, LLC, doing business as MHI Ship Repair & Services, operates as a foreign-owned prime contractor providing complex and non-complex maintenance, modernization, and repair services for U.S. Navy surface combatant and amphibious vessels, competing on full-and-open federal contracts without set-aside designations. MHI is a subsidiary of American Maritime Holdings, LLC (parent entity MHI Holdings, LLC), both based in Norfolk, Virginia.

MHI's federal portfolio is heavily concentrated in Naval Sea Systems Command (NAVSEA) work. The vendor holds two major indefinite-delivery contracts with NAVSEA covering surface combatant and amphibious class ship maintenance: a $639.8 million IDC for complex and non-complex surface combatant maintenance (awarded January 4, 2022, expiring January 3, 2027) and a $337.6 million IDC for amphibious class ship maintenance (same award and expiration dates). Both vehicles support East Coast fleet maintenance at Norfolk and Fleet, Virginia. Recent representative prime work includes a $183.6 million definitive contract with NAVSEA for USS Mesa Verde (LPD-19) FY24 Selected Restricted Availability, awarded February 28, 2024 (completion August 7, 2026); a $104.1 million definitive contract for USS New York (LPD-21) FY25 Selected Restricted Availability, awarded April 25, 2025 (completion September 27, 2026); and a $25.3 million delivery order for USS Fort Lauderdale (LPD-28) FY27 Selected Restricted Availability, awarded October 12, 2026 (completion March 10, 2027). Smaller delivery orders under the two IDCs range from under $250,000 for emergency maintenance to roughly $34 million for planned availability scope.

Customer concentration is extreme. NAVSEA accounts for 180 awards (over 98% of award count) representing $5.79 billion of combined potential value across the entire $6.18 billion portfolio. Department of the Navy Military Sealift Command supplies 58 awards valued at $286.3 million combined potential value, representing the second-ranked customer by both metrics but a distant second. The top five Navy commands account for 100% of combined potential value, with nine other federal agencies appearing in the portfolio in negligible volume. MHI competes exclusively in Navy surface and amphibious ship repair — it has no civilian agency work and no combat-systems development presence.

Across 868 total awards (852 prime, 16 sub), activity has been declining: 16 awards in 2022, 11 in 2023, 10 in 2024, and 11 in 2025, with only 2 awards in 2026 (the data snapshot is current through October 12, 2026). Only two awards carry ultimate completion dates in the next twenty-four months, with combined potential value of $50.9 million — a minimal recompete cliff relative to MHI's portfolio scale. This suggests either that most active work is bundled into large multi-year contracts (consistent with the $183.6 million and $104.1 million definitive contracts noted above) or that the vendor's award velocity is moderating.

MHI subcontracts work to specialty vendors rather than serving as a sub itself. Named subcontractors across recent awards include Metro Machine Corp. (component and systems work, appearing on USS Bush CVN 77 FY25 CMAV and USS Ford CVN 78 delivery orders), Crowley Government Services (maritime prepositioning force vessel operations and maintenance, Government-Owned Maritime Prepositioning Force vessel layberth support), and East Coast Repair & Fabrication (structural and mechanical work on USS McFaul DDG-74 ISRA-1 and USS Oscar Austin DDG-79 availabilities). The USS New York contract summary documents a multi-tier subcontractor base spanning 25+ named vendors, including Boxx Systems (grit tanks), Electric Motor and Contracting Company (pump and motor overhauls), Accurate Marine Environmental (tank cleaning), Bay Metals & Fabrication (structural fabrication), United Rentals (equipment rental), Prillaman's Crane & Rigging (crane services), and Advanced Integrated Technologies (electrical systems). This fragmented subcontracting structure reflects the labor-intensive, multi-system scope of Navy availability work.

MHI also appears as a subcontractor to Metro Machine Corp. and Crowley Government Services on nuclear carrier availability work (USS Eisenhower CVN 69, USS Ford CVN 78) and military sealift command vessel maintenance, indicating the vendor supports primes executing larger Navy surface fleet programs. The sub awards total only 16 across the portfolio (2% of total), confirming that MHI's business model is almost entirely prime contracting with NAVSEA.

The vendor's NAICS and PSC profiles confirm a pure-play ship repair positioning: Ship Building and Repairing (286 awards) is the dominant NAICS, and Non-Nuclear Ship Repair (East) accounts for 526 awards across the PSC taxonomy. The portfolio contains no IT, engineering services, or support-services work — MHI is specialized to Norfolk-area Navy surface ship maintenance, performing continuity maintenance availabilities, selected restricted availabilities (SRAs), integrated ship readiness assessments (ISRAs), emergency maintenance availabilities (EMAVs), and continuous maintenance availabilities (CMAVs) on guided-missile destroyers (Arleigh Burke-class), cruisers (Ticonderoga-class), amphibious transport docks (San Antonio-class, LPD-21), and amphibious assault ships (Wasp and Iwo Jima-class).