HII Unmanned Systems, Inc.

HII Unmanned Systems, Inc., a division of Huntington Ingalls Industries, manufactures and sustains unmanned underwater vehicles (UUVs), autonomous maritime systems, and related equipment as a prime contractor to the Department of the Navy, competing on full-and-open, non-set-aside basis across nearly 450 recent federal awards worth $4.26 billion in combined potential value.

HII Unmanned Systems is a for-profit manufacturer of goods headquartered in Pocasset, Massachusetts, with subordinate operations in Panama City, Florida and Woburn, Massachusetts. The division specializes in design, fabrication, testing, sustainment, and field support of unmanned systems—primarily the MK18 unmanned underwater vehicle platform, the REMUS family of autonomous vehicles, and the Littoral Battlespace Sensing Autonomous Underwater Vehicle (LBS AUV). Recent representative work includes a $353.9 million firm fixed-price definitive contract awarded September 2023 for LIONFISH Small Unit Unmanned Underwater Vehicle fabrication, test, and delivery through 2028 (subcontractors include Teledyne RD Instruments, Exail Defense Systems, Sicom Industries, Falmouth Scientific, and Curtiss-Wright Electro-Mechanical); a $19.4 million Marine Corps Other Transaction Agreement awarded November 2024 for development and delivery of a Production-Ready, Inexpensive, Maritime Expeditionary (PRIME) Small Unmanned Surface Vehicle and collaborative intercept capability; and a $13.96 million Defense Advanced Research Projects Agency definitive contract awarded April 2023 for the Advanced Propulsor, Experimental (APEX) submarine propulsor technology design, build, and test under classified parameters.

Customer concentration sits heavily with the Department of the Navy. The Naval Sea Systems Command (NAVSEA) alone accounts for 256 awards (57% of the prime portfolio) worth $3.65 billion in combined potential value; the remaining four top customers by award count—Naval Meteorology and Oceanography Command (66 awards, $27 million), Defense Contract Management Agency (28 awards, $32.2 million), Information Warfare Systems Command (18 awards, $124.3 million), and Defense Logistics Agency Aviation (17 awards, $281 thousand)—collectively represent 28% of awards and account for 85% of the portfolio by count. The single largest dollar customer by potential value outside NAVSEA is Department of the Navy proper ($353.9 million for the LIONFISH contract). This concentration reflects HII Unmanned Systems' role as the prime developer and integrator for the Navy's core unmanned underwater vehicle platforms.

HII Unmanned Systems operates under multiple single-award indefinite-delivery contracts with NAVSEA. The most recent is a $85.7 million single-award IDC for UUV system support, MK18 UUV procurement, sustainment, and technical services running through June 2030, awarded June 2025; the company also holds an $8.7 million single-award IDC for Littoral Battlespace Sensing Autonomous Underwater Vehicle hardware, spares, and services through September 2026. These vehicles anchor recurring delivery orders for fleet technical support, depot-level maintenance, system and software support, parts procurement, troubleshooting and repair, and operational training. Additional task-order vehicles include Indefinite Delivery Contract N0017419D0010 (40 orders, $59.1 million), N6230608D9003 (38 orders, $7.5 million), N0017414D0001 (32 orders, $42.7 million), N0017407D0001 (23 orders, $22.2 million), and N6230612D2000 (23 orders, $4.1 million)—all Navy vehicles. Activity has declined year over year (23 awards in 2022 to four by mid-2026), and 13 awards worth $43.1 million in combined potential value reach ultimate completion within the next twenty-four months, creating recompete exposure.

In its subcontractor role, HII Unmanned Systems provides unmanned maritime systems integration and component support to larger primes. Named subcontract work includes Booz Allen Hamilton on maritime mission systems support (October 2024), Leidos on autonomous and automated systems design and system engineering for Naval Information Warfare Center Pacific (April 2023), Defense Systems and Solutions on REMUS 600 MK 18 system integration support for the Prototype Integration Facility at Redstone Arsenal, Alabama (May 2026), and Peraton on unmanned underwater vehicle operations and fleet support for the Explosive Ordnance Disposal UUV project under the Unmanned Maritime Systems Support Multiple Award Contract (February 2025).

The corporate structure lists HII Unmanned Systems, Inc. as a division of Huntington Ingalls Industries, the largest U.S. shipbuilder. Multiple registrations appear in SAM under the HII Unmanned Systems, Inc. name, all pointing to the parent Huntington Ingalls Industries UEI. The division carries primary NAICS 3451 (Search, Detection, Navigation, Guidance, Aeronautical, and Nautical System and Instrument Manufacturing) and secondary codes in engineering services, electrical equipment manufacturing, and boat building, reflecting the breadth of UUV and autonomous systems work. Top PSCs align with marine equipment maintenance, repair, rebuild, and miscellaneous ship and marine equipment procurement. All recent awards carry no set-aside designation, positioning HII Unmanned Systems as a competitor in the unrestricted federal marketplace for specialized unmanned maritime capabilities rather than as a small business or minority-owned participant.