Orion Group Holdings, Inc. operates as a specialty construction company in the building, industrial, and infrastructure sectors in the continental United States, Alaska, Canada, and the Caribbean Basin. It operates through two segments, Heavy Civil Marine Construction and Commercial Concrete Construction. The company's marine construction services include construction, restoration, maintenance, and repair of marine transportation facilities and pipelines, bridges and causeways, and marine environmental structures. Its marine transportation facility projects comprise public port facilities for container ship loading and unloading; cruise ship port facilities; private terminals; and special-use navy terminals, recreational use marinas and docks, and other marine-based facilities. The company's marine pipeline service projects consist of the installation and removal of underwater buried pipeline transmission lines; installation of pipeline intakes and outfalls for industrial facilities; construction of pipeline outfalls for wastewater and industrial discharges; river crossing and directional drilling; creation of hot taps and tie-ins; and inspection, maintenance, and repair services. Its bridge and causeway projects include the construction, repair, and maintenance of overwater bridges and causeways, as well as the development of fendering systems in marine environments; and marine environmental structure for erosion control, wetlands creation, and environmental remediation. In addition, the company offers dredging services; and specialty services, such as design, salvage, demolition, surveying, towing, diving and underwater inspection, excavation, and repair services. Further, it provides light, structural, and other commercial concrete construction services. The company was formerly known as Orion Marine Group, Inc. and changed its name to Orion Group Holdings, Inc. in May 2016. Orion Group Holdings, Inc. was founded in 1994 and is headquartered in Houston, Texas.