updated 2/25/2011 9:16:39 AM ET 2011-02-25T14:16:39

DALLAS and SAN DIMAS, Calif., Feb. 25, 2011 (GLOBE NEWSWIRE) -- Primoris Services Corporation (Nasdaq:PRIM) ("Primoris" or "Company") today announced that Dr. Roberto Ruiz has been named President and Chief Operating Officer of OnQuest, Inc., the Company's wholly-owned subsidiary. A proven leader with twenty-five years of experience in industrial technology, Dr. Ruiz joined OnQuest in November 2010 and assumed full operational responsibility on January 1, 2011.

Dr. Ruiz previously was a Vice President at the John Zink Company, first in technology and commercial development and then as business leader for the process burner group. He has worked in process design, environmental controls, fuels, gas separation, heat transfer, fluid mechanics and advanced diagnostics.  In his managerial roles, Dr. Ruiz has been responsible for commercial development, international operations, and strategic planning for applications in the oil and gas industries.

Prior to joining John Zink Company in 1997, Dr. Ruiz worked with the Gas Research Institute and later with Air Liquide, where he was commercial manager in the gas separation business. He earned M.S. and Ph.D. degrees in mechanical engineering from the University of Minnesota and a B.S. in engineering at the University of California, Los Angeles. Dr. Ruiz also earned an MBA at the University of Chicago Booth School of Business.

Dr. Ruiz succeeds David J. Baker, who founded OnQuest in 2002 and grew the company from a start-up operation to being a leader in furnace technology for process plants and petrochemical refining. OnQuest now has offices in four locations, including at its headquarters in San Dimas, California, at its Born Canada operating subsidiary in Calgary, Alberta, and at sales and project management offices in Houston, Texas, and Pittsburg, California. Mr. Baker transferred to Primoris, and remains a senior advisor to the management team at OnQuest.

ABOUT ONQUEST, INC.

Established in 2002, OnQuest provides specialized design and engineering for process plants, direct-fired furnaces and related combustion technologies, burner management systems, and clean-air and NOx technologies, along with turn-key project management on construction projects. OnQuest has primary offices in San Dimas, Calif., and Calgary, Alberta, along with operations in Houston, Texas, and has sales representatives worldwide.

ABOUT PRIMORIS

Founded in 1946, Primoris, through various subsidiaries, has grown to become one of the largest specialty contractors and infrastructure companies in the United States. Serving diverse end markets, Primoris provides a wide range of construction, fabrication, maintenance, replacement, water and wastewater, and engineering services to major public utilities, petrochemical companies, energy companies, municipalities, and other customers. With its acquisitions of James Construction Group in December 2009 and Rockford Corporation in November 2010, Primoris has doubled its size and the Company's national footprint now extends from Florida, along the Gulf Coast, through California, into the Pacific Northwest and Canada. For additional information, please visit www.prim.com

The Primoris Services Corporation logo is available at http://www.globenewswire.com/newsroom/prs/?pkgid=5527

FORWARD LOOKING STATEMENTS

This press release contains certain forward-looking statements, including with regard to the Company's future performance. Words such as "estimated," "believes," "expects," "projects," "may," and "future" or similar expressions are intended to identify forward-looking statements. Forward-looking statements inherently involve risks and uncertainties, including without limitation, those described in this press release and those detailed in the "Risk Factors" section and other portions of our Annual Report on Form 10-K for the year ended December 31, 2009, our Form 10-Q for the three month period ended September 30, 2010, and other filings with the Securities and Exchange Commission. Primoris does not undertake any obligation to publicly update or revise any forward-looking statements, whether as a result of new information, future events or otherwise, except as may be required under applicable securities laws.

CONTACT: Company Contact
         Peter J. Moerbeek
         Executive Vice President, Chief Financial Officer
         (214) 740-5602
         pmoerbeek@prim.com
         
         The Equity Group Inc.
         Devin Sullivan
         Senior Vice President
         (212) 836-9608
         dsullivan@equityny.com

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