Established in 1948 in Grand Isle, LA, GIS began as a modest company serving the commercial fishing industry. It quickly evolved, entering into the emerging Oil & Gas Industry in the Gulf of Mexico.Today, GIS services the oil and gas industry nationally and internationally. With nearly 2000 employees, 21 strategically located facilities, and 21 service lines, GIS has the resources to span the complete life cycle of our customers'​ projects, and the capability to provide solutions in the upstream, midstream, and downstream markets. We align our services with operations from the development stage of major projects, through construction, commissioning, and ultimately de-commissioning.

Project Management Shorebase Services Fabrication Production Operator Maintenance and Construction Offshore Construction & Maintenance Onshore Construction & Maintenance Electrical & Instrumentation Civil Construction & Aggregates Engineering Production Management Dockside Services Safety & Training Environmental Fire & Safety Polycoatings Mack Steel & Supply Transportation Medium Bolting & Torquing Scaffolding Equipment Rentals Marine Services Offshore Construction & Maintenance Onshore Construction & Maintenance Electrical & Instrumentation Civil Construction & Aggregates Safety & Training Fire & Safety Mack Steel & Supply Bolting & Torquing Energy Oil and Gas Field Services Nec Oil & Energy