Autotrader has named Jessica Stafford senior vice president and general manager. Stafford will lead the business, which has more than 800 team members, and work across product, sales, marketing and operations. Stafford joined Autotrader in 2007 as an associate manager of digital marketing before moving to various other marketing positions within the company, including her most recent role as vice president of marketing for Cox Automotive’s Media Group portfolio, which includes Autotrader, Kelley…