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. Its segments include marine and concrete. Its marine segment provides construction and dredging services, including marine transportation facility construction, marine pipeline construction, marine environmental structures construction, dredging of waterways, channels and ports, environmental dredging, design, and specialty services related to marine construction, fabrication, and dredging. Its concrete segment provides turnkey concrete construction services, including concrete surface place and finish, site preparation, layout, forming, and rebar placement for large commercial, structural and other associated business areas. Its specialty services include design, salvage, demolition, surveying, towing, and others.