Exhibit 23.1

INDEPENDENT AUDITORS' CONSENT

We consent to the incorporation by reference in this Registration Statement of
ManTech International Corporation on Form S-8 of our report dated November 16,
2001, except for Note 8, as to which the date is December 17, 2001, appearing in
a Registration Statement on Form S-1 (No. 333-73946) of ManTech International
Corporation filed with the Securities and Exchange Commission on November 23,
2001, as amended.

/s/ Deloitte & Touche LLP
McLean, Virginia
February 27, 2002

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