AutoNation Inc., the nation's largest auto retailer, said CFO Mike Short has left the company effective Tuesday.
AutoNation's treasurer, Cheryl Scully, 41, has been named interim CFO, the company said in a statement Tuesday.
AutoNation said Heidrick & Struggles International Inc., a Chicago executive search firm, will help the company find a new CFO. AutoNation said it will consider internal and external candidates.
"I am proud to have contributed to [AutoNation's] success," Short, 52, said in a statement. "I have decided that now is the appropriate time to begin planning the next chapter, both professionally and personally for my family."
AutoNation, of Fort Lauderdale, Fla., ranks No. 1 on Automotive News' list of the top 125 dealership groups in the United States, with retail sales of 267,810 new vehicles in 2012.