Substructure provides complete, fully integrated solutions to challenging marine problems – from assessment, design, and fabrication to full implementation in the field.

Browse Industries Served

Industrial Services

Commercial Diving

Marine Corrosion Control

Marine Design, Fabrication and Integration

Marine Rehabilitation

Custom-Built & Patented Equipment

Hydrographic & Structural Surveys

I was impressed by the thought process Substructure went through in designing Orion. They considered a lot of different design features — from the transducer mount, flow dynamics around the head, and propulsion system to vibration and noise dampening. They did the engineering and development and it shows.
— Alan Nichols, Chief of Survey and Mapping Section, US Army Corps of Engineers

Recent Projects

About Substructure


Substructure is a privately held, multidisciplinary, marine services company founded in 1996 and headquartered in Portsmouth, New Hampshire. Substructure is the gold standard for marine industrial services due to its technical expertise, customized equipment, project management, and customer support.

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