Close on the heels of The Carlyle Group’s $4.2 billion acquisition of ManTech in mid-September, the company said on Monday that President and CEO Kevin Phillips will retire and transition to chairman of the board and be succeed by Matt Tait as the new president and CEO, effective immediately.

Tait was ManTech’s chief operating officer, having joined the company in 2018 following two decades with Accenture [ACN] working on information technology initiatives for customers in the defense, federal civilian, health care and financial sectors. Tait graduated from the U.S. Naval Academy and served 10 years with the service.

“Kevin has guided ManTech through an extraordinary transformation in providing government customers with innovative solutions and digital capabilities, and we are thrilled that he will continue to be a guiding force as chairman,” Dayne Baird, a managing director at Carlyle and one of ManTech’s new board directors, said in a statement. “As Kevin steps into this new role, we are fortunate to have an established leader of Matt’s caliber to succeed him as part of this planned transition. We have had the opportunity to work closely with Matt over the last several months, and he has proven to be an outstanding leader with a deep understanding of customer missions and the emerging trends shaping our industry.”

Phillips was also chairman of ManTech since December 2020. In addition to Phillips and Baird, the company’s new board members include Tait, Brian Bernasek, a managing director at Carlyle, Mary Bush, president of Bush International, Jonathan Darby, former director of operations of the National Security Agency’s Central Security Service, Ian Fujiyama, managing director at Carlyle, Beth Kimber, vice president for intelligence community strategy at Two-Six Technologies, Tom Rabaut, operating executive at Carlyle, and William Varner, former president of ManTech’s Mission, Cyber & Intelligence Solutions Group.