Orion Group Holdings, Inc. engages in the provision of specialty construction services in the building, industrial, and infrastructure sectors. It operates through the Marine and Concrete segments. Read More The Marine segment includes the restoration, maintenance, dredging, and repair of marine transportation facilities, pipelines, bridges and causeways and environmental structures. The Concrete segment involves cement pouring for products such as columns, elevated beams, sidewalks, ramps and tilt walls. The company was founded in 1994 and is headquartered in Houston, TX. The listed name for ORN is Orion Group Holdings, Inc.