The Rev. Dr. Jon D. Vieker is senior assistant to Rev. Dr. Matthew C. Harrison, president of The Lutheran Church--Missouri Synod. Prior to joining the president's staff in September 2010, Vieker served as assistant director for the LCMS Commission on Worship, a position he began in November 1998. In that position, he was involved with all aspects of research, development, editing and production of Lutheran Service Book and its core companion volumes.
