Portrait of Patrick Callahan

Patrick Callahan

Chief Executive Officer

Patrick brings more than 18 years of defense and leadership experience, including expertise in business development, program management, strategic planning and international business to his work at ADG.

From 2014 to 2020, Patrick was the CEO of Critical Solutions International (CSI) and continues to serve as a member of CSI’s Board of Directors.

For two years prior, Patrick helped to lead the company as CSI’s Chief Strategic Officer, responsible for CSI’s international growth, business development and research and development operations.

Through his work at CSI he helped to advance the counter-IED and route clearance capabilities of deployed U.S. and allied forces.

Before joining CSI, Patrick was the Director of Business Development for the Survivability Division of QinetiQ North America (QNA), where he was responsible for the development of patented technologies that drastically improved the survivability of the warfighter in combat environments.

While at QNA, he managed the growth of this business, closing domestic and international contracts valued at more than $800 million.

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