Partial list of Substructure clients.
| Clients |
| Abington Group |
| AECOM Technology Corporation |
| Barletta Heavy |
| Bath Iron Works |
| Bernstein Shur |
| Beverly, Massachusetts |
| Boston Boat Works |
| Boston Police Department |
| Cianbro |
| CLD Consulting Engineers |
| Clipper Marine Services A/S |
| Coastal Vision |
| Collins Engineers |
| Combined Energies |
| Del-Ray |
| Dover, New Hampshire |
| Earthtech |
| Environment Canada |
| Granite State Minerals |
| Green Seal Environmental |
| Helix |
| Indian Point Power Plant |
| Irving Terminals |
| Liberty Mutual |
| Lowell Regional Water Utility |
| Maine Department of Transportation |
| Methuen Construction |
| Moran Towing |
| Nashua, New Hampshire |
| New Hampshire Department of Transportation |
| Newington, New Hampshire |
| Normandeau Associates |
| Northeast Corrosion Consultants |
| Oceaneering International |
| Oceanport LLC |
| Offshore Coastal Technologies |
| Ontario Power De Joachims Generating Station |
| Pennichuck Water |
| Pilot Construction |
| Portsmouth Pilots |
| Portsmouth, New Hampshire |
| Prock Marine |
| R2Sonic |
| Rhode Island Department of Environmental Management |
| Rhode Island Department of Transportation |
| Sea-3 |
| Sound Advice Ship Agency |
| South Essex Sewerage District |
| Sprague Energy |
| SSA |
| Sterling Marine |
| Teledyne RDI |
| Truston Technologies |
| Turks and Caicos |
| Underwood Engineers |
| University of New Hampshire |
| U.S. Army Corps of Engineers |
| U.S. Coast Guard |
| U.S. Navy |
| Walker Diving |
| Waste Management |
| Watson Bowman Acme |
| Wheelabrator |
| Woodward & Curran |
