Core-Mark Holding Company, Inc. announced that it has appointed Diane Randolph to its Board of Directors. Ms. Randolph is the Chief Information Officer of Ulta Beauty, Inc. in Bolingbrook, Illinois, a position she has held since October 2014. Prior to Ulta, Ms. Randolph was a Vice President and Chief Information Officer of Reitmans (Canada) Ltd., a Canadian retailer specializing in women’s clothing, where she worked from 2005 through September 2014. Prior to Reitmans, Ms. Randolph served in roles of increasing responsibility in software development and implementation for STS Systems Ltd. (now Aptos, Inc.).