source: Audi of America Mark Del Rosso steps down as Audi of America president Del Rosso served 11 years in leadership roles with Audi and Bentley Cian O'Brien, Audi of America COO, to serve as interim head of brand HERNDON – Mark Del Rosso, president of Audi of America, is leaving the company, effective immediately. Cian O'Brien, Audi of America's chief operating officer, will assume interim leadership of the brand in the U.S. Del Rosso spent 11 years in leadership roles at Audi an...