Pastor Kieser is pastor and headmaster at Trinity Lutheran Church and Classical School of Riverton, Wyoming. He previously served as teacher and administrator at Lutheran schools in Florida, Illinois, and texas. He also served as pastor in Storm Lake, Iowa; Darmstadt, Indiana; and Plano, Texas.

Pastor Kieser graduated from Concordia – Ann Arbor in 1993 (Mathematics and Biology Education) and received a Master of Arts in School Leadership from Concordia – Chicago in 2000. He graduated from Concordia Theological Seminary in 2006 and was ordained into the Office of the Holy Ministry that same year. He has served as the president of the Consortium for Classical Lutheran Education since 2006.