Thoma-Sea Marine Constructors, LLC

Booth #1627
6130 Hwy 308
Lockport , LA 70374
United States

Thoma-Sea Marine Constructors is a family-owned full service shipyard with 3 Gulf Coast locations in Lockport and Houma, Louisiana. Our facilities included two new construction yards and one repair yard.
Thoma-Sea’s experienced, dedicated professionals use a common sense approach to quality ship building and repair.
Thoma-Sea’s broad range of experience includes: Offshore Towing vessels up to 11,000 horse power. Ship Escort Z Drive Tugs; ATB Tugs; Mini Supply Vessels; DP 2 Diesel Electric Platform Supply Vessels; Research Vessels; Inland Push Boats and Commercial Fishing Vessels.
Currently under construction are (2) Special Purpose DP 2 Diesel Electric Vessels.
Recent vessel deliveries include the first Two vessels constructed in the United States using Siemens Blue Drive Plus C technology.

Thoma-Sea’s repair facilities currently have 5 dry-docks in operation all of them less than 7 years old ranging from a 200×70 2500 ton dock to a 320×120 8500 ton dock. Our newest dry-dock measures 360’x160’x9’ equipped with a well for servicing drop down thrusters..

Products & Services


Shipbuilding / Repair

Since 1990 Thoma-Sea has built over 100 high quality vessels serving various trades around the world. In 2008 we started our repair division to date we have dry docked and repaired over 400 vessels.  We are capable of building and repairing vessels in excess of 300’.

Barge Building Repair

We have the capabilities to build and repair barges in excess of 400’. We are conveniently 35 miles from the Gulf of Mexico on the Houma Navigation Canal with no air draft restrictions and 16’ controlling depth in the channel. For our customers working the ICW we are located 1 mile south of MM 59.

Boat Building / Repair

  • Barge Building and Repair
  • Boat Building and Repairs
  • Shipyard