**Exhibit 31.1**

 

**VANGENT,INC.**

**CERTIFICATIONOF CHIEF EXECUTIVE OFFICER**

 

I, John M. Curtis,President and Chief Executive Officer, certify that:

 
| 1.     |   | I have reviewed this  quarterly report on Form 10-Q for the three months ended June 28,  2008, of Vangent, Inc.;                                                                                                                                                                                                    |
|--------|--------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
|   |   |                                                                                                                                                                                                                                                                                                                               |
| 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;                    |
|   |   |                                                                                                                                                                                                                                                                                                                               |
| 4.     |   | The registrant’s other  certifying officer and I are responsible for establishing and maintaining  disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and  15d-15(e)) for the registrant and we have:                                                                                   |
|   |   |                                                                                                                                                                                                                                                                                                                               |
|   |   | a)                                                                                                                                                                                                                                                                                                                                 | designed such  disclosure controls and procedures, or caused such disclosure controls and  procedures to be designed under our supervision, 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 report is being prepared; and |
|   |   |                                                                                                                                                                                                                                                                                                                               |
|   |   | b)                                                                                                                                                                                                                                                                                                                                 | evaluated the effectiveness  of the registrant’s disclosure controls and procedures and presented in this  report our conclusions about the effectiveness of the disclosure controls and  procedures, as of the end of the period covered by this report based on such  evaluation; and |
|   |   |                                                                                                                                                                                                                                                                                                                               |
|   |   | c)                                                                                                                                                                                                                                                                                                                                 | disclosed in this  report any change in the registrant’s internal control over financial  reporting that occurred during the registrant’s most recent fiscal quarter  (the registrant’s fourth fiscal quarter in the case of an annual report) that  has materially affected, or is reasonably likely to materially affect, the  registrant’s internal control over financial reporting; |
|   |   |                                                                                                                                                                                                                                                                                                                               |   |
| 5.     |   | The registrant’s other  certifying officer and I have disclosed, based on our most recent evaluation  of internal control over financial reporting, to the registrant’s auditors  and the audit committee of the registrant’s board of directors (or persons  performing the equivalent functions):                 |
|   |   |                                                                                                                                                                                                                                                                                                                               |   |
|   |   | a)                                                                                                                                                                                                                                                                                                                                 | all significant  deficiencies and material weaknesses in the design or operation of internal  controls over financial reporting which are reasonably likely to adversely  affect the registrant’s ability to record, process, summarize and report  financial information; and |
|   |   |                                                                                                                                                                                                                                                                                                                               |   |
|   |   | b)                                                                                                                                                                                                                                                                                                                                 | any fraud, whether or  not material, that involves management or other employees who have a  significant role in the registrant’s internal control over financial  reporting. |

 

 
|                 | /s/ John M. Curtis                     |
|----------------------|----------------------------------------|
| August 11, 2008 | John M. Curtis                         |
|                 | President and Chief  Executive Officer |

 

1

----