HOUSTON, July 23, 2012 (GLOBE NEWSWIRE) -- Orion Marine Group, Inc. (NYSE:ORN) (the "Company") today announced it will release its financial results for the second quarter 2012 on Thursday, August 2, 2012, at approximately 5:00 a.m. Eastern Time/4:00 a.m. Central Time. The Company will conduct a telephone briefing at 10:00 a.m. Eastern Time/9:00 a.m. Central Time on Thursday, August 2, 2012, to discuss its results for the second quarter 2012.

To listen to a live broadcast of this briefing, visit the Investor Relations section of the Company's website at www.orionmarinegroup.com. To participate in the call, please call the Orion Marine Group First Quarter 2012 Earnings Conference Call at 888-771-4371; Participant code: 32944857.

A replay of this briefing will be available on the Web site within 24 hours and will be archived for two weeks. To listen to the replay by phone, please call the replay line at 888-843-7419; passcode 3294 4857#.

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 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 a 75-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 Finance, 713-852-6506
         Drew Swerdlow, Senior Financial Analyst, 713-852-6582