PRIMU Primoris Services - Units (MM)

Primoris Services Corporation (Nasdaq:PRIM) (Nasdaq:PRIMW) ("Primoris" or "Company") announced today that it will issue its financial results for the first quarter ended March 31, 2010 on Monday, May 10, 2010, before the stock market opens. Management will host a conference call that morning at 11:30 am Eastern Time / 8:30 am Pacific Time to discuss the results. 

Interested parties may participate in the call by dialing:

• (866) 255-7436 (Domestic)

• (706) 634-4739 (International)

The conference call will also be broadcast live via the Investor Relations section of Primoris's website at www.primoriscorp.com. Once at the Investor Relations section, please click on "Events & Presentations". If you are unable to participate in the live call, the conference call will be archived and can be accessed for approximately 90 days.

About Primoris

Primoris, through various subsidiaries, is 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 and replacement services, as well as engineering services to major public utilities, petrochemical companies, energy companies, municipalities and other customers. With the recent acquisition of 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.

Primoris Services Corporation logo is available at http://www.globenewswire.com/newsroom/prs/?pkgid=7187

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