CHICAGO — Navistar International Corp. has named Troy A. Clarke chief executive officer effective April 15, replacing interim chief executive Lewis B. Campbell.

Clarke, currently president and chief operating officer, will also join Lisle, Ill.-based Navistar’s board, while Campbell—who has served as executive chairman and interim chief executive officer since last August—will step down from the board. Clarke will also maintain his position as president.

James H. Keyes, a board member since 2002, will become nonexecutive chairman, also effective April 15.

"Over the past six months, Navistar has made significant progress on many important fronts, including on our three near-term priorities: improving quality, meeting each of our clean engine launch milestones and delivering on our 2013 operating plan," Campbell said. "Our turnaround is firmly under way and our return to profitability is clearly in sight."

Clarke previously served as president of Navistar Asia Pacific. He joined the company in January 2010 after spending 35 years at General Motors Co. in several leadership roles, including president of GM North America.