Orion Marine Group Presenting At The 9th Annual D.A. Davidson & Co. Engineering & Construction Conference

HOUSTON, Sept. 23, 2010 (GLOBE NEWSWIRE) -- Orion Marine Group, Inc. (NYSE:ORN) (the "Company"), a leading heavy civil marine contractor serving the infrastructure sector, today announced Mike Pearson, Orion Marine Group's President and Chief Executive Officer, will be presenting at the 9th Annual D.A. Davidson & Co. Engineering & Construction Conference on Tuesday, September 28, 2010. The presentation is scheduled to begin at 4:45 p.m. (ET)/3:45 p.m. (CT).

A live webcast of the presentation will be available on the Investor Relations section of the Company's website at www.orionmarinegroup.com . The webcast and accompanying slide presentation will be archived on the website within 24 hours and will be available for at least two weeks.

About Orion Marine Group

Orion Marine Group, Inc. provides a broad range of marine construction and specialty services on, over and under the water along the Gulf Coast, the Atlantic Seaboard, Canada, the West Coast and the Caribbean Basin and acts as a single source turn-key solution for its customers' marine contracting needs. Its heavy civil marine construction services include marine transportation facility construction, marine pipeline construction, marine environmental structures, dredging, and specialty services. Its specialty services include salvage, demolition, diving, surveying, towing and underwater inspection, excavation and repair. The Company is headquartered in Houston, Texas and has near 100-year legacy of successful operations.

The Orion Marine Group, Inc. logo is available at http://www.globenewswire.com/newsroom/prs/?pkgid=4539

CONTACT: Orion Marine Group, Inc.
         Chris DeAlmeida, Director of Investor Relations
         713-852-6506