$14.7 billion U.S. truck and engine maker Navistar International Corp., has announced the retirement of its Chief Risk Officer William Caton, effective Oct. 31. Navistar said in a filing with the Securities and Exchange Commission that his decision to retire was not a result of any disagreement with the company or its management.

Caton joined Navistar in October 2005 as the executive vice president of finance, was named chief financial officer in September 2006, and took up his current post in June 2008, according to the company's Website. During his time with Navistar, Caton oversaw the company's financial restatement and reporting process.

The company has not yet named a successor.