ManTech Defense Systems Group (DSG)
The Defense Systems Group (DSG) of ManTech International Corporation, has established itself as an industry leader in worldwide technology support providing support to the U.S. Army, U.S. Navy, and U.S. Air Force as well as other key Department of Defense customers.

The DSG member subsidiaries include:

• ManTech Telecommunications and Information Systems Corporation (MTISC)
• ManTech Systems Engineering Corporation (MSEC)

ManTech Information Systems & Technology (MIST)
For over a decade, the people of MIST have been leaders in providing high-quality, national security and advanced information technology-related solutions for the corporate and government workplace.

ManTech Security & Mission Assurance (MSMA)
ManTech Security & Mission Assurance is a leading provider of information technology and professional technical services to the national security community.

ManTech SRS (MSRS)
MSRS is a diversified C4ISR systems engineering and information systems company with expertise in technology and systems development programs. For more than thirty years MSRS has contributed to leading-edge technology demonstration, system development, system integration and evaluation programs.

The MSRS member subsidiaries include:

• ManTech Space Systems (SS)