Summit Automotive Partners said COO and company co-founder Bill Carmichael has been named CEO and president of the Denver-based dealership group.
He succeeds Rod Buscher, 59, who left Summit earlier this year to explore "other opportunities" outside of the dealer group, the company said.
Carmichael, 57, is a founding partner at privately held Summit. He co-founded Summit in 2007 after stepping down as the head of AutoNation Inc.'s west central region.
A spokesperson for the dealership group said Carmichael has been serving in the CEO and president roles since Buscher's departure.
"Bill brings a tremendous wealth of experience and leadership to all of Summit's dealerships," George Gillett, principal at Summit, said in a statement. "With Bill's proven track record and industry insights, we're well-positioned for growth and success."
Summit ranked No. 43 on the Automotive News list of the Top 125 U.S. dealership groups in the United States with retail unit sales of 13,686 last year.
Summit manages Groove Auto in Denver, Vista Auto Group in Silverthorne, Colo., Action Nissan in Nashville, Tenn. and Berlin City Auto, which has several locations throughout New England.
The company also owns H.M. Brown & Associates, an auto broker firm in Denver.