Seemann Composites, LLC

Seemann Composites, LLC, a small disadvantaged business based in Gulfport, Mississippi, manufactures advanced composite materials, components, and related engineering services for naval and defense applications, operating as a prime contractor on 91% of recent awards and as a subcontractor to major defense primes on submarine and surface-vessel programs. The company is a for-profit limited-liability corporation with one named subsidiary, Materials Sciences LLC, and competes predominantly in full-and-open (non-set-aside) procurement, though total small business set-asides appear on roughly one-third of awards.

Seemann Composites' customer concentration is extreme and intentional: the Department of the Navy's Naval Sea Systems Command (NAVSEA) funds 140 of 178 prime awards (79% of award count) and anchors $1.17 billion of the company's $1.24 billion combined potential value across all awards. This concentration reflects Seemann's strategic role as NAVSEA's primary supplier of composite propulsors, shafting, bearing components, hull treatments, and specialized coatings for Columbia-class, Virginia-class, and future SSN(X) submarine programs, as well as LCAC (Landing Craft, Air Cushion) composite components and Seawolf-class bow dome fabrication. The Office of Naval Research contributes a secondary customer base ($35.1 million, nine awards) focused on unmanned undersea vehicle (UUV) propulsor development, while the Defense Logistics Agency Troop Support Construction and Equipment places occasional small orders ($428 thousand, seven awards) for plumbing fixtures and cable trays — commodity work outside Seemann's core capability set but consistent with the vendor's small-business status and willingness to fulfill straightforward supply requirements.

Seemann holds four substantial single-award indefinite-delivery contracts with NAVSEA, awarded between 2021 and 2025 and collectively valued at approximately $327.6 million: a $74.9 million IDC (expires July 2026) for composite propulsor prototypes and HYSHMA coatings; a $97.8 million IDC (PC SAM vehicle, expires March 2030) for composite propulsors, shafting, bearing components, and advanced materials; a $62 million IDC (expires August 2030) for multi-material propeller prototype development; and a $92.8 million IDC (expires September 2030) for out-of-autoclave composite fabrication processes and SBIR Phase III development work. These vehicles support the top five named parent IDVs in the award portfolio, which collectively account for hundreds of delivery orders and hundreds of millions of dollars in potential value. Recent representative prime work includes a $54.3 million definitive contract (September 2024) for LCAC 100-class composite components and nine craftsets valued through November 2030; a $27.1 million cost-plus-incentive contract (December 2024) for Columbia-class ropeguard kits, reference cell cover kits, and anode cover kits through December 2029; a $23.1 million STTR Phase III delivery order (September 2024) for Seawolf-class submarine bow dome fabrication through September 2027; and a $20.8 million SBIR Phase III delivery order (September 2025) for out-of-autoclave development and demonstration through January 2030. The company also receives smaller delivery orders for syntactic fill materials, cable trays, cable hangers, and Life Extension Duct (LED) design and fabrication, representing both core composite capability work and commodity supply fill-ins.

Seemann competes as a subcontractor to Electric Boat Corporation and Huntington Ingalls Inc. on Columbia-class and Seawolf-class submarine construction and modernization, with sub awards dating from 2022 through November 2025 covering streamlined changes, material procurements, secondary propulsion unit components, and advance planning protectors. One sub award to Textron Systems Corp (May 2024) covers material procurement under terms with weighted billing factors.

Award activity has remained steady to slightly declining year-on-year: 18 awards in 2022, 12 in 2023, 17 in 2024, 14 in 2025, and 3 recorded through March 2026. However, 18 awards with combined potential value of $138.9 million face ultimate completion inside the next twenty-four months, creating significant recompete exposure across LCAC, Columbia-class kit manufacturing, and propulsor development vehicles. The company has obligated $440.1 million (35% of combined potential value) across all awards, reflecting the typical delay between ceiling awards and cash flow on long-term development and manufacturing programs. Work is performed exclusively at Seemann Composites' Gulfport, Mississippi facility, with one contract (Seawolf bow dome tooling storage) executed through a Westlake, Maryland site. The top NAICS categories across the award portfolio are ship building and repairing (40 awards), engineering services (36 awards), and custom compounding of purchased resins (29 awards), with R&D-Defense services and ship/boat propulsion components dominating the PSC breakdown. The vendor's core capability set centers on advanced composite development, prototyping, and production — not plumbing fixtures, despite occasional commodity DLA awards — and NAVSEA's strategic reliance on Seemann's specialized submarine propulsion and structural-component expertise anchors the entire commercial footprint.