Ford Motor Co. (F) said Thursday it will change some of its top executive responsibilities starting Sept. 1 as the auto maker takes another step to implement a common worldwide vision for the company.

Jim Farley, 47, who jumped to Ford from Toyota Motor Co. (TM), will now oversee the auto maker's operations in Canada, Mexico and South America. The duties are in addition to his global marketing responsibilities.

"Jim has made great progress connecting with our customers and building a strong foundation for our success in North America," Chief Executive Alan Mulally said in a statement. "He will continue to lead marketing globally, focusing on building the Ford brand around the world."

Ken Czubay, 60, is appointed to the expanded role of vice president of U.S. marketing sales and service, reporting directly to Mulally. Czubay had reported to Mark Fields, Ford's president of the Americas.

The changes underscore Ford's continuing effort to promote a single global vision for the company that has been Mulally's mantra since taking over as chief executive in 2006. Auto makers are trying to pull global operations more closely together to save costs and implement new ideas more quickly.

Ford also announced that Frederiek Toney will replace Darryl Hazel as president of the Ford Customer Service Division. Hazel is retiring after 37 years with the company and will serve as a special adviser to the auto maker on global services initiatives.

Toney, 53, joined Ford in 2000 after working at Caterpillar Inc. (CAT) and Honda Motor Co. (HMC). He has served as director of North American logistic and operations.

Bob Shanks, 56, will replace Peter Daniel as the auto maker's controller. Daniel is retiring after 38 years. Shanks will report to Ford Chief Financial Officer Lewis Booth. Shanks has been a corporate officer since July 2004.

Dave Schoch, 58, currently head of Canada, Mexico and South America, will become controller of the Americas.

Rounding out the changes, Ray Day, vice president of communications, now will report directly to Mulally.

-By Jeff Bennett; Dow Jones Newswires 248-204-5542; jeff.bennett@dowjones.com