8-K

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the

Securities Exchange Act of 1934

Date of Report (Date of Earliest Event Reported): August 23, 2010

ManTech International Corporation

(Exact name of registrant as specified in its charter)

Delaware	000-49604	22-1852179
(State or other jurisdiction of incorporation)	(Commission File Number)	(IRS Employer Identification No.)
12105 Lee Jackson Highway Fairfax, VA		22033
(Address of principal executive offices)		(Zip Code)

Registrant’s telephone number, including area code (703) 218-6000

(Former name or former address, if changed since last report.)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below):

¨ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

¨ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

¨ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

¨ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Item 8.01 Other Events

On August 23, 2010, ManTech International Corporation announced a new senior management structure. A copy of the press release is attached as Exhibit 99.1 to this Current Report on Form 8-K and is incorporated herein by reference.

Item 9.01 Financial Statements and Exhibits

(d) Exhibits

Exhibit Number	Description of Exhibit
99.1	ManTech International Corporation press release, dated August 23, 2010, announcing new senior management structure.

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

	ManTech International Corporation
Date: August 23, 2010	By:	/s/ Michael R. Putnam
		Michael R. Putnam
		Senior VP – Corporate & Regulatory Affairs

EX-99.1

Exhibit 99.1

Investor Contact

Stuart Davis

ManTech International

(703) 218-8269

Stuart.davis@mantech.com

Media Contact

Amy Gooen

ManTech International

(703) 218-6387

Amy.Gooen@mantech.com

ManTech Announces New Senior Management Structure

Current Operating Group Presidents to have Chief Operating Officer

Responsibility for their Organizations

Fairfax, Va. – August 23, 2010 – ManTech International Corporation (NASDAQ:MANT) (www.mantech.com), a leading provider of technical and engineering services and solutions vital to the nation’s interest and security, announced a new senior management structure under which the presidents of ManTech’s three operating groups will also serve as chief operating officers for their respective organizations, reporting to the company’s Chairman and Chief Executive Officer, George J. Pedersen.

The three group president/chief operating officers are Louis M. Addeo, ManTech Technical Services Group; Terry M. Ryan, ManTech Systems Engineering and Advanced Technologies; and L. William Varner, ManTech Mission, Cyber and Technology Solutions.

“We believe that this new management structure will contribute to our ability to achieve our financial objectives and support our customers’ critical missions,” said Pedersen. “Our three group presidents have my complete confidence. Their strong leadership, strategic vision, understanding of the market, and ability to work jointly have contributed significantly to ManTech’s success over the past year. This team is poised to deliver market-leading growth, profitability and cash generation.”

“The board of directors considers all three group presidents extremely strong, capable leaders,” said Barry G. Campbell, presiding independent director. “All three have significantly grown and matured their organizations, and they will focus on creating value in their respective businesses by growing revenue and profits and attracting, developing and retaining the best people.”

Before joining ManTech, Addeo was the chief operating officer of Serco NA. He also was president of AT&T Government Solutions, and vice president of AT&T’s National Information Systems.

Ryan was director of intelligence, surveillance and reconnaissance for the Office of the Department of Defense, and president and chief executive officer of Adroit Systems Inc., and president and chairman of Mercury Federal Systems.

Varner was vice president, corporate officer and executive director of the Intelligence Operations Unit of Northrop Grumman TASC. He was previously with ESL Inc.

About ManTech International Corporation

Headquartered in Fairfax, Va., with approximately 9,100 professionals, ManTech is a leading provider of innovative technologies and solutions for mission-critical national security programs for the intelligence community; the departments of Defense, State, Homeland Security and Justice; the space community; the National Oceanic and Atmospheric Administration; and other U.S. federal government customers. ManTech’s expertise includes systems engineering, systems integration, enterprise architecture, cyber security, information assurance, intelligence operations and analysis support, network and critical infrastructure protection, information operations and information warfare support, information technology, communications integration, global logistics and supply chain management, and service-oriented architectures. Additional information on ManTech can be found at www.mantech.com.