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Exhibit 31.1

CERTIFICATIONS PURSUANT TO RULE 13A-14 UNDER THE SECURITIES EXCHANGE ACT OF
1934, AS AMENDED

I, Ross Perot, Jr., certify that:



|1. |  | I have reviewed this Amendment No. 1 on Form 10-Q/A of Perot Systems
Corporation;                                                                                                                                                                                                                                             
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|2. |  | Based on my knowledge, this quarterly report does not contain any untrue
statement of a material fact or omit to state a material fact necessary to
make the statements made, in light of the circumstances under which such
statements were made, not misleading with respect to the period covered by
this quarterly report;
|  
|3. |  | Based on my knowledge, the financial statements, and other financial
information included in this quarterly report, fairly present in all
material respects the financial condition, results of operations and cash
flows of the registrant as of, and for, the periods presented in this
quarterly report;                   
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|4. |  | The registrants other certifying officers and I are responsible for
establishing and maintaining disclosure controls and procedures (as
defined in Exchange Act Rules 13a-14 and 15d-14) for the registrant and we
have:                                                                                                     



| | a) |  | designed such disclosure controls and procedures to ensure that
material information relating to the registrant, including its
consolidated subsidiaries, is made known to us by others within those
entities, particularly during the period in which this quarterly report
is being prepared;
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| | b) |  | evaluated the effectiveness of the registrants disclosure controls
and procedures as of a date within 90 days prior to the filing date of
this quarterly report (the Evaluation Date); and                                                                                                  
|
| | c) |  | presented in this quarterly report our conclusions about the
effectiveness of the disclosure controls and procedures based on our
evaluation as of the Evaluation Date;                                                                                                                        



|5. |  | The registrants other certifying officers and I have disclosed, based on
our most recent evaluation, to the registrants auditors and the audit
committee of registrants board of directors (or persons performing the
equivalent function):
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| | a) |  | all significant deficiencies in the design or operation of internal
controls which could adversely affect the registrants ability to
record, process, summarize and report financial data and have
identified for the registrants auditors any material weaknesses in
internal controls; and
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| | b) |  | any fraud, whether or not material, that involves management or
other employees who have a significant role in the registrants
internal controls; and                                                                                                                                        



|6. |  | The registrants other certifying officers and I have indicated in this
quarterly report whether or not there were significant changes in internal
controls or in other factors that could significantly affect internal
controls subsequent to the date of our most recent evaluation, including
any corrective actions with regard to significant deficiencies and
material weaknesses.
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August 14, 2003

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|/s/ ROSS PEROT, JR.Ross Perot, Jr.
Principal Executive Officer