Primoris Services Corporation Announces Executive Promotions

Primoris Services Corporation (Nasdaq:PRIM) (Nasdaq:PRIMU) (Nasdaq:PRIMW) ("Primoris" or "Company"), one of the largest specialty contractors and engineering companies in the United States, today announced that Michael D. Killgore was recently named Executive Vice President, Director of Construction Services for Primoris, and Danny L. Hester has been named President of James Construction Group, the Company's wholly-owned subsidiary.

Mr. Killgore has more than 30 years of experience in the construction industry, 20 years of which have been in a management capacity. In his new role, Mr. Killgore will be responsible for overall management related to the operations of Primoris's recently formed "Construction Services – East" and "Construction Services - West" business segments. Prior to the acquisition of James Construction Group ("JCG") by Primoris in December 2009, Mr. Killgore had served as CEO of JCG since 2007, President of JCG's Industrial Division (2003-2006), President of James Industrial Contractors, LLC (1998-2002), and Executive Vice President, and then President of T.L. James Industrial Constructors, Inc. (1992-1998). He earned a degree in Civil Engineering from Louisiana Tech University and is a Registered Professional Civil and Environmental Engineer in the State of Louisiana. He is a longtime member of Associated Builders and Contractors and served as secretary on the Louisiana Pelican Chapter's 2009 board of directors.

Mr. Hester has more than 35 years of heavy and civil construction experience in the United States, Saudi Arabia, Colombia, Oman, Canada and the Philippines. His management resume includes major projects for military, federal, state and local governmental agencies. He has served as JCG's Chief Operating Officer since 2006 and was Vice President – Heavy Civil Operations Manager (2002-2006). Prior to joining JCG, Mr. Hester held positions of increasing responsibility at H. B. Zachry Company and Morrison Knudsen Corporation. Mr. Hester earned his B.S. degree in Construction Management.

Brian Pratt, Chairman, President and Chief Executive Officer of Primoris, commented, "The acquisition of JCG created a variety of benefits for Primoris; among the most relevant was the addition of exceptional employee stakeholders, such as Mike and Danny. With more than 65 years of combined industry experience and a track record of success around the world, we are confident that both of them will seamlessly transition to their respective new role and make significant contributions to the continuing growth of Primoris."

About Primoris

Primoris, through various subsidiaries, is one of the largest specialty contractors and engineering companies in the United States. Primoris provides a wide range of construction, fabrication, maintenance and replacement services, as well as engineering services to major public utilities, petrochemical companies, energy companies, municipalities and other customers. With the addition of the James Construction Group, Primoris has a significant presence in the Gulf States region where it provides heavy civil construction services. Primoris is also a leading water and wastewater contractor in the state of Florida, and a specialist in designing and constructing complex commercial and industrial concrete structures in California. For additional information on Primoris, please visit www.primoriscorp.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," 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, 2008 and other filings with the Securities and Exchange Commission, including the Company's Form 10-K to be filed on or before March 12, 2010. 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: Primoris Services Corporation

Peter J. Moerbeek, Executive Vice President,

Chief Financial Officer

(949) 454-7121

pmoerbeek@primoriscorp.com

The Equity Group Inc.

Devin Sullivan, Senior Vice President

(212) 836-9608

dsullivan@equityny.com

Gerrard Lobo, Senior Account Executive

(212) 836-9610

globo@equityny.com