**Exhibit31.2**

 

WrittenCertification of Chief Financial Officer

 

 

I, Thomas A. Mutryn, certify that:

 

1.  Ihave reviewed this quarterly report on Form 10-Q of GTSI Corp.;

 

2. Based on my knowledge, this report does not contain any untrue statementof a material fact or omit to state a material fact necessary to make thestatements made, in light of the circumstances under which such statements weremade, not misleading with respect to the period covered by this report;

 

3. Based on my knowledge, the financial statements and other financialinformation included in this report, fairly present in all material respectsthe financial condition, results of operations and cash flows of the registrantas of, and for, the periods presented in this report;

 

4.  Theregistrant’s other certifying officer and I are responsible for establishingand maintaining disclosure controls and procedures (as defined in Exchange ActRules 13a-15(e) and 15d-15(e)) and internal control over financial reporting(as defined in Exchange Act Rules 13s-15(f) and 15d-15(f)), for the registrantand have:

a.               Designed such disclosurecontrols and procedures, or caused such disclosure controls and procedures tobe designed under our supervision, to ensure that material information relatingto the registrant, including its consolidated subsidiaries, is made known to usby others within those entities, particularly during the period in which thisreport is being prepared;

b.              Designed such internalcontrol over financial reporting , or caused such internal control overfinancial reporting to be designed under our supervision, to provide reasonableassurance regarding the reliability of financial reporting and the preparationof financial statements for external purposes in accordance with generally acceptedaccounting principles;

c.               Evaluated the effectivenessof the registrant’s disclosure controls and procedures and presented in thisreport our conclusions about the effectiveness of the disclosure controls andprocedures, as of the end of the period covered by this report based on suchevaluation: and

d.              Disclosed in this report anychange in the registrant’s internal control over financial reporting thatoccurred during the registrant’s most recent fiscal quarter that has materiallyaffected, or is reasonable likely to materially affect, the registrants’internal control over financial reporting; and

 

5.  Theregistrant’s other certifying officer and I have disclosed, based upon our mostrecent evaluation of internal control over financial reporting, to theregistrant’s auditors and the audit committee of the registrant’s board ofdirectors:

a.               All significant deficienciesand material weaknesses in the design or operation of internal control overfinancial reporting which are reasonable likely to adversely affect theregistrant’s ability to record, process, summarize and report financialinformation; and

b.              Any fraud, whether or notmaterial, that involves management or other employees who have a significantrole in the registrant’s internal control over financial reporting.

 

Date:       May6, 2005

 
| /s/ THOMAS A. MUTRYN                               |   |
|----------------------------------------------------|--------|
| Thomas A. Mutryn                                   |   |
| Senior Vice President and  Chief Financial Officer |   |

 

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