Pastor Koelpin received his elementary school training at St. Paul’s Lutheran School in New Ulm, MN and his high school education at Minnesota Valley Lutheran High School.
- After high school he matriculated to Northwestern College in Watertown, WI where he graduated with a Bachelor of Liberal Arts from Northwestern College in 1989.
- In 1993 he received a Master of Divinity from Wisconsin Lutheran Seminary. He spent his vicarage (internship) at Christ Lutheran Church in Eagle River, WI and St. John’s Lutheran Church in Phelps, WI.
- During his final year of Seminary training, Pastor Koelpin also served as a part-time vicar at Calvary Lutheran Church in Thiensville, WI.
In 1993, Pastor Koelpin was assigned from the seminary to serve as the first associate pastor at Calvary Lutheran Church in Dallas, TX. In the year 2000 he took on the role of Lead Pastor, and since 2014 he has been the sole pastor of Calvary.
- In addition to his pastoral duties, Pastor Koelpin has served his church body on various committees, including the position of Circuit Pastor for the Dallas/Fort Worth circuit of the Wisconsin Synod.
- He has also written articles for the following Wisconsin Synod publications: Wisconsin Lutheran Quarterly, Meditations, Worship the Lord, and Preach the Word.
Pastor Koelpin and his wife Beckie live in the Lake Highlands area of Dallas.