Mark Stein is a second-generation owner of ESCO Manufacturing, a wholesale electric sign manufacturing firm with facilities in Watertown and Webster, S.D. ESCO’s primary customers are sign companies, which are located all across the United States. Also part of ESCO is Stein Sign Display, a retail sign company that sells, services, and installs signs for end-user customers, primarily in eastern South Dakota. Mark has been in and around the sign business almost his entire life, starting while still in high school during summer vacations. After graduating from Northern State in Aberdeen, Mark obtained his MBA from Arizona State University in 1979. While in college, Mark held several part-time jobs to pay for school expenses. These included videographer for KABY-TV, News Director for the campus radio station, and onsite management of a storage rental complex. Mark then joined the family business in 1980, holding several different positions in the company before purchasing the business from his father, Clint Stein, in 1989.