**Exhibit 31.1**

**CERTIFICATION BY PRINCIPAL EXECUTIVE OFFICER**

**PURSUANT TO 18 U.S.C. SECTION 1350,**

**AS ADOPTED PURSUANT TO SECTION 302**

**OF THE SARBANES-OXLEY ACT OF 2002**

I, William L. Ballhaus, certify that: 

1. I have reviewed this annual report on Form 10-K of DynCorp International LLC: 

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material factnecessary 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 report; 

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

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

(a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designedunder our supervision, to ensure that material information relating to the Company, 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;

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

(c) Evaluated the effectiveness of the Company’s disclosure controls and procedures andpresented 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 

(d) Disclosed in this report any change in the Company’s internal control over financial reporting that occurredduring the Company’s most recent fiscal quarter (the Company’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the Company’s internal control overfinancial reporting; and 

5. The Company’s other certifying officer and I have disclosed, based on our most recentevaluation of internal control over financial reporting, to the Company’s auditors and the audit committee of the Company’s board of directors (or persons performing the equivalent functions): 

(a) All significant deficiencies and material weaknesses in the design or operation of internal control over financialreporting which are 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 involves management or other employees who have a significant role in theCompany’s internal control over financial reporting. 

 

Date:June 15, 2010