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]

Small Business Office

Tess 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) 367-5690 - ManTech Company Code: 36092
Government Investigators: Please contact HR Customer Support at 866-793-MTHR (6847) or email: [email protected]

Careers/Employment Inquiries

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

Other Human Resource Questions:

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