General Inquiries

Corporate Headquarters 
ManTech International Corporation 
2251 Corporate Park Drive
Herndon, VA 20171
Phone: (703) 218-6000 ​​


Investor Relations

Stephen Vather
Email: [email protected]mantech.com


Small Business Office

Maria Palao
Phone: (703) 218-6077


Media Inquiries

Jim Crawford, Executive Director – Media Relations
Phone: (571) 446-7550


GSA and GWAC Inquiries

[email protected] 


Employment Verifications

Phone: (800) 800-4857 - ManTech Company Code: 36092
https://www.theworknumber.com


Careers/Employment Inquiries

Phone: (855) 849-6020
Email: [email protected]


Other Human Resource Questions:

Current ManTech Employees: Submit a request via https://servicenow.mantech.com/
Former ManTech Employees: Call 1-877-996-4248 and choose “HR” for 401k, benefits, and other inquiries