Deal Expands Company's Presence in Transportation Equipment Industry PLANO, Texas, July 23 /PRNewswire-FirstCall/ -- Perot Systems Corporation (NYSE:PER) (perotsystems.com) announced today that it has been awarded a five-year contract by Trinity Industries for IT application maintenance services. As part of the agreement, Perot Systems will also provide support for Trinity Industries' Oracle and PeopleSoft technology environments. "We are pleased to have been selected by Trinity Industries to support their HR and financial systems, and we value the trust they have placed in our capabilities and dedication to their business," said Steve Curts, president of Perot Systems Commercial Solutions Group. "We are committed to working with Trinity to establish a technology environment that is aligned with their operational objectives and is nimble to support their growth." Under terms of the agreement, Perot Systems will support Trinity Industries' critical systems operating on Oracle and PeopleSoft related to human resources, payroll and financial functions. "Trinity Industries is pleased to enter into this new relationship with a proven industry leader such as Perot Systems," said William A. McWhirter, Trinity's Senior Vice President and CFO. "We look forward to working with Perot Systems to create a more efficient and cost-effective set of solutions for our technology environments." About Trinity Industries Trinity Industries, Inc., headquartered in Dallas, Texas, is a multi-industry company that owns a variety of market-leading businesses which provide products and services to the industrial, energy, transportation, and construction sectors. Trinity reports its financial results in five principal business segments: the Rail Group, the Railcar Leasing and Management Services Group, the Inland Barge Group, the Construction Products Group, and the Energy Equipment Group. For more information, visit: http://www.trin.net/. About Perot Systems Perot Systems is a worldwide provider of information technology services and business solutions. Through its flexible and collaborative approach, Perot Systems integrates expertise from across the company to deliver custom solutions that enable clients to accelerate growth, streamline operations and create new levels of customer value. Headquartered in Plano, Texas, Perot Systems reported 2008 revenue of $2.8 billion. The company has more than 23,000 associates located in the Americas, Europe, Middle East and Asia Pacific. Additional information on Perot Systems is available at http://www.perotsystems.com/. This press release contains forward-looking statements that are subject to known and unknown risks and uncertainties that could cause actual results to differ materially from those expressed or implied by such statements. For factors that could affect our business and cause actual results to differ materially, please refer to our Annual Report on Form 10-K for the fiscal year ended December 31, 2008, as filed with the U.S. Securities and Exchange Commission and available at http://www.sec.gov/, as updated in our Quarterly Reports on Form 10-Q filed after such Form 10-K, for additional information regarding risk factors. We disclaim any intention or obligation to revise any forward-looking statements whether as a result of new information, future developments, or otherwise. MEDIA CONTACTS: PEROT SYSTEMS CORPORATION Karen Modlin +1 972 577-3597 Joe McNamara +1 972 577-6165 DATASOURCE: Perot Systems Corporation CONTACT: Karen Modlin, +1-972-577-3597, , or Joe McNamara, +1-972-577-6165, , both of Perot Systems Corporation Web Site: http://www.trin.net/ http://www.perotsystems.com/ Company News On-Call: http://www.prnewswire.com/comp/122686.html

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