**Exhibit 12.1**

 

**CHIEF EXECUTIVE OFFICER CERTIFICATIONPURSUANT TOSECTION 302 OF THE SARBANES-OXLEY ACT OF 2002**

 

I, Narendra K. Patni, certify that:

 

1.           I have reviewed this annual report on Form 20-Fof Patni Computer Systems Limited, hereinafter referred to as the Company, forthe year ended December 31, 2006;

 

2.           Based on my knowledge, this report does not containany untrue statement of a material fact or omit to state a material factnecessary to make the statements made, in light of the circumstances underwhich such statements were made, not misleading with respect to the periodcovered by this report;

 

3.           Based on my knowledge, the financial statements, andother financial information included in this report, fairly present in allmaterial respects the financial condition, results of operations and cash flowsof the Company as of, and for, the periods presented in this report;

 

4.           The Company’s other certifying officer and I areresponsible for establishing and maintaining disclosure controls and procedures(as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) andinternal control over financial reporting (as defined in Exchange Act Rules 13-a-15(f) and15(d)-15(f) for the Company and have:

 

(a)          Designed such disclosure controls and procedures, or causedsuch disclosure controls and procedures to be designed under our supervision,to ensure that material information relating to the Company, including itsconsolidated subsidiaries, is made known to us by others within those entities,particularly during the period in which this report is being prepared;

 

(b)         Designed such internal control over financialreporting, or caused such internal control over financial reporting to bedesigned under our supervision, to provide reasonable assurance regarding thereliability of financial reporting and the preparation of financial statementsfor external purposes in accordance with generally accepted accountingprinciples;

 

(c)          Evaluated the effectiveness of the Company’sdisclosure controls and procedures and presented in this report our conclusionsabout the effectiveness of the disclosure controls and procedures, as of theend of the period covered by this report based on such evaluation; and

 

(d)         Disclosed in this report any change in the Company’sinternal control over financial reporting that occurred during the periodcovered by the annual report that has materially affected, or is reasonablylikely to materially affect, the Company’s internal control over financialreporting; and

 

5.           The Company’s other certifying officer and I havedisclosed, based on our most recent evaluation of internal control overfinancial reporting, to the Company’s auditors and the Audit Committee of theCompany’s board of directors (or persons performing the equivalents functions):

 

(a)          All significant deficiencies and material weaknessesin the design or operation of internal control over financial reporting, whichare reasonably likely to adversely affect the Company’s ability to record,process, summarize and report financial information; and

 

(b)         Any fraud, whether or not material, that involvesmanagement or other employees who have a significant role in the Company’sinternal control over financial reporting.

 
| Date: March 04,  2008 |   |
|----------------------------|--------|
|                       |   |
| /s/ Narendra K. Patni      |   |
| Narendra K. Patni          |   |
| Chief Executive Officer    |   |

 

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