Thoma-Sea Marine Constructors, L.L.C.
Houma, LA Headquarters
- UEI
- CHEUP6NNZHL9
- CAGE
- 6CEL5, 03B99
- Primary NAICS
- 336611 Ship Building and Repairing
- SAM.gov registration
- Active through
Company facts
- FY2025 rankings
- Self-certified in SAM.gov
- Entity structure
- Other
- Other NAICS codes in SAM.gov
- Corporate family
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- Thoma-Sea Marine Constructors LLC · Lockport, LA MKC5N9TCVJL5
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- SAM.gov registration date
- Physical address
- 137 Barry Belanger St, Houma, LA 70363, USA
- Website
- thoma-sea.com
- Founded
- 1990
- Employees
- 51-250
- Estimated annual revenue
- $10M-$50M
- Industry
-
- Industrials
- Transportation
- Marine
- SIC code
- 37 Transportation Equipment
- Profiles
Registration and certifications come from SAM.gov and the SBA; company details from public web sources. Updated .
Contract obligations by fiscal year
| Fiscal year | Obligated |
|---|---|
| FY2027 To date | $0 |
| FY2026 | $40,906,587 |
| FY2025 | $37,507,996 |
| FY2024 | $30,656,898 |
| FY2023 | $324,549,674 |
Top agencies by obligations
| Rank | Agency | Obligated, FY2026–FY2027 | Share |
|---|---|---|---|
| 1 | Department of Commerce | $24,250,000 | |
| 2 | Department of Homeland Security | $10,646,812 | |
| 3 | Department of the Army | $6,009,774 |
Contract awards
| Award | Agency | Obligated | Awarded |
|---|---|---|---|
| USCGC tiger shark DD FY27 | Coast Guard | $1,101,201 | |
| USCGC stingray DD FY26 | Coast Guard | $1,323,640 | |
| CGC harry claiborne drydock repairs | Coast Guard | $2,893,705 | |
| USCGC cobia DD 4/21/2026 to | Coast Guard | $1,072,144 | |
| USCGC mallet DD FY26 | Coast Guard | $1,358,113 |
Latest 5 listed here. See the rest on GovTribe.
Similar vendors
| Vendor | Location | Primary NAICS |
|---|---|---|
| ST. Johns Boat Company | Jacksonville, FL | 336611 Ship Building and Repairing |
| Jag Industrial Services, Inc. | Jonesville, MI | 336611 Ship Building and Repairing |
| Bay Ship & Yacht Co | Alameda, CA | 336611 Ship Building and Repairing |
| Mills Marine & Ship Repair LLC | Suffolk, VA | 336611 Ship Building and Repairing |
| Advanced Diesel Solutions L.l.c | Guaynabo, Guaynabo | 336611 Ship Building and Repairing |
About the company
Thoma-Sea Marine Constructors, L.L.C. Headquarters Division is a for-profit limited liability company based in Houma, Louisiana, that designs and builds oceanographic research vessels and executes drydock repairs, vessel maintenance, and maritime construction for federal agencies as a prime contractor. The company operates entirely on prime awards (100% prime, 0% sub) and competes predominantly under small business set-asides—particularly total small business designations on Coast Guard and Army work—though several of its highest-value awards carry no set-aside. Thoma-Sea is self-certified as a Small Disadvantaged Business.
Customer concentration is extreme. The top five agencies account for 97% of combined potential value, led by the Department of Commerce National Oceanic and Atmospheric Administration (2 awards, $650 million combined potential value), which awarded a $650 million firm fixed-price definitive contract on June 23, 2023, for detail design and construction of Class B research vessels with ultimate completion December 30, 2031, performed in Houma. The Department of the Navy Naval Sea Systems Command holds the second-largest value position (3 awards, $212.8 million), followed by the Department of the Army (6 awards, $92.4 million), the Department of Homeland Security US Coast Guard (35 awards, $87.4 million), and the Army Corps of Engineers Engineering District Philadelphia (8 awards, $32.7 million). By award count, the Coast Guard dominates—35 of 61 awards—but dollars are anchored by NOAA's single massive vessel-construction contract. The cost rankings diverge sharply: NOAA's one high-value design and construction contract dwarfs the Coast Guard's numerous smaller drydock repair orders.
Capability portfolio centers on ship repair, drydock maintenance, and vessel construction under NAICS 336611 (Ship Building and Repairing). Representative Coast Guard work includes a $4.9 million delivery order for USCGC Harry Claiborne drydock repairs issued May 5, 2026 under a single-award Coast Guard Indefinite Delivery Contract with a $2.78 million ceiling; a $4.17 million definitive contract for USCGC Joseph Napier drydock repairs awarded June 10, 2025; and a $1.97 million definitive contract for USCGC Charles Sexton drydock repairs awarded September 9, 2025. Army Corps of Engineers work includes a $22.1 million definitive contract for shipyard preparation and repowering of the Dredge Hurley awarded October 7, 2024 (with $4.6 million in SCI-reported invoiced labor at 1.9 FTEs in FY2025, self-performed). The company holds a $20 million multiple-award Blanket Purchase Agreement with the Army Corps of Engineers running through May 30, 2029, for dry dock services including shipyard overhaul, vessel conversion, and barge fabrication.
Activity has oscillated moderately year over year—three awards in 2022, nine in 2023, six in 2024, nine in 2025, and six in 2026 through mid-November—yielding a combined potential value of $1.11 billion across 61 awards, with $729 million obligated (66% realization). Three awards with combined potential value $66.9 million reach ultimate completion inside the next twenty-four months and face recompete exposure. SCI-reported invoicing across federal service contracts above the $150,000 threshold totaled $24.5 million over FY2022–FY2025 ($5.9 million in FY2022, zero in FY2023, $9.9 million in FY2024, $8.7 million in FY2025), reflecting 19.4, 0, 26.1, and 15.4 FTEs respectively; the FY2023 gap and FY2025 decline likely correspond to the massive NOAA vessel-construction contract, which is capital work rather than service-reportable labor. Median government-paid rates on SCI-recordable work ran $173.57 per hour, spanning $112.32 per hour at the 10th percentile to $232.29 per hour at the 90th percentile. Thoma-Sea self-performed all reported labor with zero subcontractor engagement across SCI-reportable prime contracts, indicating a fully in-house delivery model for the measured work. The company's parent-vehicle positioning is sparse: only a Coast Guard Indefinite Delivery Contract ($2.78 million ceiling) and a Basic Ordering Agreement carry named task orders in the source data, reflecting Thoma-Sea's preference for definitive contracts and purchase orders rather than IDV vehicles.
Quick answers
Is Thoma-Sea Marine Constructors, L.L.C. registered in SAM.gov?
Yes. Thoma-Sea Marine Constructors, L.L.C.'s SAM.gov registration is active through September 2, 2027.
How much has Thoma-Sea Marine Constructors, L.L.C. received in federal contracts?
Federal contracts obligated $37,507,996 to Thoma-Sea Marine Constructors, L.L.C. in fiscal year 2025 and $433,621,154 in fiscal years 2023 through 2027.
How does Thoma-Sea Marine Constructors, L.L.C. rank among federal contractors?
Thoma-Sea Marine Constructors, L.L.C. ranked #3 in PSC 1910, #10 in PSC J019 and #27 in PSC J998 in FY2025.
What is Thoma-Sea Marine Constructors, L.L.C.'s most recent federal award?
Thoma-Sea Marine Constructors, L.L.C.'s most recent federal contract award is USCGC tiger shark DD FY27 (70Z08026CPBPL0045), from Coast Guard, on November 17, 2026.
On GovTribe
See Thoma-Sea Marine Constructors, L.L.C.'s full federal record
- Federal contract awards
- IDV awards
- Funding analysis by agency, NAICS and set-aside
- Similar vendors