**Exhibit 31.1**

 

**VANGENT, INC.**

**CERTIFICATION OF CHIEF EXECUTIVEOFFICER**

 

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  March 29, 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                    |
| May 13,  2008 | John M. Curtis                         |
|               | President and  Chief Executive Officer |

 

----