Jill Lajdziak, Saturn's former top executive, was named president of Smart USA just three days after starting with the company.
David Schembri, who previously held the job, will take an unidentified position with the Penske Automotive Group, which distributes the Smart ForTwo microcar in the United States, the company said.
"Dave will transition into retail operations at Penske Automotive Group with our dealerships," said Penske spokesman Anthony Pordon. "We haven't slotted him into a position at one of the dealerships. We will help him become part of our retail operations group in various different capacities it could be running a store or a group or a group of stores."
Lajdziak, 53, joined Smart on Jan. 1 as vice president of marketing and sales. On Monday, Penske Automotive unexpectedly announced her promotion to the top job.
"As we look to enhance the position of the Smart brand, Jill's background and experience will help us reinvigorate the dealer network and bring a greater awareness to the smart brand," Roger Penske, chairman of the Penske Automotive Group, said in a statement.