CTC said Tuesday Sheehan is one of the 16 newly elected board members at NDIA.
Richard McConn, board chairman of NDIA, said Sheehan's experience in manufacturing and professional services sectors will help the association carry out its mission.
“NDIA board members represent a variety of perspectives, all working together to ensure that our service men and women are properly prepared to defend our nation and defeat every adversary,“ Sheehan said.
Sheehan serves as vice chairman of CTC's board; board chair of the Enterprise Ventures; and president and vice chairman of the CTC Foundation.
He also sits on the boards of John P. Murtha Foundation, Friends of Flight 93 National Memorial and 1st Summit Bank.
NDIA is a nonprofit organization that leverages the experience and knowledge of its 85K individual and 1.6K corporate members to address defense and national security issues.