Orion Group Holdings, Inc., formerly Orion Marine Group, Inc., is engaged in the heavy civil construction project management business. The Company specializes in marine construction. It provides a range of heavy civil marine construction services to federal agencies, state and municipal governments, and private commercial and industrial customers. Its heavy civil marine construction and project management services include new construction, dredging, repair and maintenance, and other related specialty services. The Company provides its heavy civil marine construction services on, over and under the water in the continental United States, Alaska, Canada and the Caribbean Basin. It provides heavy civil marine construction services through projects that are obtained primarily through a competitive bid or contract process.