Taco John’s hired former McDonald’s executive Greg Miller to serve as chief operating officer.

Miller has spent more than 30 years in the restaurant industry, including 27 with McDonald’s where he held a variety of operations and marketing roles, working in seven different regions across the U.S. Miller then joined Whataburger, where he served as regional director of operations for two years. Most recently, Miller was division vice president of operations at Jack in the Box.

Taco John’s has nearly 400 locations systemwide across 22 states.