Charlotte, N.C. — Sonic Automotive, Inc., one of the nation’s largest automotive retailers, has promoted Thomas “Tim” Keen to become the first chief operating officer of EchoPark Automotive, the company’s rapidly growing nationwide pre-owned vehicle segment. Keen has spent nearly 30 years in the automotive industry and has been with Sonic Automotive for the past 15 years, holding a variety of regional leadership positions with the company’s franchised dealerships. In 2014, Keen was named divisional vice president of EchoPark Automotive, where he was instrumental in developing the EchoPark model and …