Orion Group Holdings, Inc. is a specialty construction company that serves the infrastructure, industrial, and building sectors. The Company provides services both on and off the water in the continental United States, Alaska, Hawaii, Canada and the Caribbean Basin. It 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. The concrete segment provides turnkey concrete construction services, including place and finish, site prep, layout, forming, and rebar placement for large commercial, structural, and other associated business areas. The Company's specialty services include design, salvage, demolition, surveying, towing, diving and underwater inspection, excavation, and repair.