Navistar International (NYSE:NAV) has announced that current president and chief operating officer Troy Clarke has been named CEO, and will become a board member, effective April 15. Clarke succeeds interim CEO and executive chairman Lewis Campbell.

Campbell has served as interim CEO since August 2012. Upon completion of the leadership, Campbell will retire from the Navistar board. Longtime Navistar board member James Keyes will assume the non-executive chairman role, also effective April 15.

Clark joined Navistar in 2010 as president of Navistar Asia Pacific, prior to his promotion to president and COO. Prior to Navistar, Clark held several management positions during a 35-year career with GM.

In response to his appointment, Clark said, "I am honored to take on the role of CEO and join the board of Navistar. In six short months, we have made significant progress on our turnaround, and I want to thank Lewis for his guidance and leadership during this period."