Englewood, Colo. — Red Robin Gourmet Burgers, Inc., a full-service restaurant chain, under its North Star growth plan, has made a series of key appointments toward the completion of its executive leadership team. This includes the appointment of Kevin Mayer to chief marketing officer and Mark Simpson as interim chief people officer, effective May 1. In addition, Jason Rusk has been promoted to chief business development officer. “With these crucial leadership positions in place, we are well-positioned to deliver on our goal to establish Red Robin as a most loved …