While attending the University of Tennessee, Mr. Beall and college friends founded the Ruby Tuesday concept and subsequently grew Ruby Tuesday to 16 units. In 1982, they opened the first L&N Seafood Grill.

In 1982, Morrison Incorporated acquired the Ruby Tuesday and L&N Seafood Grill concepts and named Sandy President of the Specialty Division. The Silver Spoon Cafe (formerly changed to Mozzarella's Cafe, now known as American Cafe) concept was added in 1984 and the Tia's concept in 1995.

He was named executive vice president of Morrison in 1985, and was elected president and COO in 1987. He assumed the title of CEO in 1992 and chairman of the board in May 1995. In March 1996, Ruby Tuesday, Inc. became a separate, publicly held corporation with Sandy as chairman and CEO.

Mr. Beall serves as on the board of directors for Pilot Corporation, Pilot Travel Centers, LLC, Friends of Great Smoky Mountains National Park and SSC Service Solutions. He is a member of the University of Tennessee Development Council, Maryville College Advisory Board, and the Chief Executives Organization and World President's Organization. In 1994, MUFSO (Multi-Unit Food Service Operators) honored Beall as Operator of the Year. He was also named Executive of the Year by Restaurants and Institutions Magazine.