LONDON and PLANO, Texas, July 21 --

- A Leading Global Telecom Company Renews Outsourcing Deal

Perot Systems Corporation (NYSE: PER) (http://www.perotsystems.com) has
announced that it has been awarded a three year extension to its current IT
services agreement with the 3 Group, Hutchison Whampoa’s 3G mobile
telecoms business. The agreement further strengthens the three year-old
relationship between the two companies, building on Perot Systems’
outstanding track record of meeting its service level agreement objectives.
Financial terms of the contract were not disclosed.

Under the extended agreement, Perot Systems will continue to provide ongoing
maintenance and management of key IT business applications, including effective
knowledge management and solutions in service activation support for the seven
3G telecommunication operators of Hutchison Whampoa’s 3 Group.

Co-ordination of the project will be driven extensively from Perot
Systems’ Bucharest, Romania facility as part of the company’s global
delivery network of applications, infrastructure and consulting solutions. This
contract demonstrates Perot Systems’ continued commitment to the EMEA
region and to providing quality domain expertise and technical talent to the
market.

We are committed to helping Hutchison Whampoa continue its exceptional record
of service delivery in the telecoms market, said Ferenc Szelényi, EMEA Managing
Director at Perot Systems. We are proud to be one of Hutchison Whampoa’s
trusted service providers, as it continues to deliver high-quality services to
its customers in the coming years.

About 3 Group

A division of Hutchison Whampoa, the 3 Group together with Hutchison
Telecommunications International Limited, is the leading global player in the 3G
arena, holding licenses in 11 markets with total population coverage of
approximately 175 million.

The 3 Group has built an entirely new mobile broadband network, achieving
probably the fastest rollout of a radio network in the entire telecom industry.
Marketed globally under the 3 brand, the group was the first operator in the
world to provide dual-mode 3G services.

To date, commercial 3G services have been launched in Italy, the UK, Australia,
Austria, Sweden, Denmark, Hong Kong, Israel and Ireland. Hutchison announced
more than 20 million customers in March 2009.

For more information about 3, please visit www.three.com

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 US$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 Joe McNamara +1-972-577-6165
joe.mcnamara@ps.net Karen Modlin +1-972-577-3597 Karen.modlin@ps.net UK Charlie
Richards +44-20-7892-1071 Charlie.richards@ps.net OCTANE PR UK Katie Simpson
+44-20-7802-2662 katies@octanepr.com

SOURCE: Perot Systems Corporation

Joe McNamara, +1-972-577-6165, joe.mcnamara@ps.net, or Karen Modlin,
+1-972-577-3597, Karen.modlin@ps.net, or UK, Charlie Richards, +44-20-7892-1071,
Charlie.richards@ps.net, all of Perot Systems Corporation; or UK, Katie Simpson
of OCTANE PR, +44-20-7802-2662, katies@octanepr.com, for Perot Systems
Corporation