Insperity Inc., a Texas-based provider of human resources and business performance solutions, has opened district office with sales and service capabilities at 6510 S. Millrock Drive, Suite 200, Holladay, and named Corbitt Mizell as district manager. Mizell will be responsible for helping to oversee area sales efforts. He has more than 20 years of sales and management experience. Prior to joining Insperity, he served as an area sales manager for a telecommunications company. Mizell’s education includes a bachelor’s degree in management from Brigham Young University.