Kevin and Cathy Mulholland of Ballwin announce the engagement of their daughter, Kelly Mulholland, to Ryan Johnson, son of Bryan and Susan Johnson of Chesterfield. The bride-to-be received a bachelor of science degree in housing and interior design from Missouri State University in Springfield. She is a sales support representative with Protective Insurance in Chesterfield. Her fiance received a bachelor of science degree in construction management from Missouri State University in Springfield. He is a project manager for M. D. Magary Construction Co. in St. Louis. The couple lives in University City. He proposed on Jan. 13, 2012, her birthday. They plan to be married March 23, 2013, at St. Joseph Catholic Church, Clayton.