Stephen Deitz

President, Federal Civilian Sector at ManTech International

Stephen Deitz is the Executive Vice President and General Manager of ManTech’s Federal Civilian Sector. In his role, Mr. Deitz leads the Sector’s work to advance solutions that address federal civilian agencies’ mission needs for modernization of operations, systems and infrastructure; best-in-class security and effective data utilization.

Over the course of his ManTech career, Mr. Deitz has served in multiple leadership roles serving defense, intelligence and federal civilian customers. He has a proven track record of winning business while building successful teams – promoting and advancing the enablement of new skills and capabilities.

Prior to joining ManTech, Mr. Deitz spent 10 years with CSC building and managing large service desk offerings for federal customers and grew the business by more than 200 percent. He also implemented quality management, program management and training programs to increase accountability and consistency across the business.

Before that, Mr. Deitz held strategy and operational positions as COO of ZAI and as a consultant to the pharmaceutical industry overseeing business growth, operational efficiency, technology enablement, profit and loss, quality and customer delivery. His expertise spanning more than 25 years in government contracting and commercial industry provides a strong foundation for serving federal government agencies – leveraging his experience, insights and forward-looking approach to innovation and efficiency to drive mission success at speed.

Mr. Deitz earned a Master of Science in Technology Management from the University of Maryland Global Campus and a Bachelor of Science in Business Administration from Shenandoah University. He holds a certificate in Executive Leadership from Cornell University, is a certified Project Management Professional (PMP) and a member of the Project Management Institute (PMI).


  • President, Federal Civilian Sector

    Current role

  • EVP & General Manager, Federal Civilian Sector

    February, 2022

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