sentences:  He oversaw daily management and operational strategies until retirement in December 2008.Scott L. Thompson, who joined the company as Senior Executive Vice President and Chief Financial Officer in May 2008, stepped in as the newest President and CEO.Former Hertz Global Holdings Chairman and CEO Mark P. Frissora announced the company's purchase of Dollar Thrifty Automotive Group for US$2.3 billion on November 19, 2012.