Orion Group Holdings, Inc. is a specialty construction company, which serves the infrastructure, industrial, and building sectors, providing services both on and off the water in the continental United States, Alaska, Canada, and the Caribbean Basin. The Company operates through two segments, Marine and Concrete. The Marine segment provides construction and dredging services relating to marine transportation facility construction, marine pipeline construction, marine environmental structures, dredging of waterways, channels and ports, environmental dredging, design, and specialty services. Specialty services include design, salvage, demolition, surveying, towing, diving and underwater inspection, excavation, and repair. The Concrete segment provides turnkey concrete construction services including pour and finish, dirt work, layout, forming, rebar, and mesh across the light commercial, structural, and other associated business areas.