Our Pastors

Pastor Koehler

Pastor Ron Koehler serves as Grace’s administrative pastor and oversees the congregation’s multi-site ministry. He also has regular pastoral duties at the Grace-Tucson location. He grew up in Michigan, where his pastor inspired him to consider the pastoral ministry. He has served at Grace since 1993, after serving for two years teaching English, supervising the boy’s dormitory, and coaching at Martin Luther Preparatory School in Prairie du Chien, Wisconsin. 

He and his wife, Debbie, have enjoyed living in Arizona and raising two sons here. The people at Grace are very special to them, and they consider it a privilege to have seen the Lord bless the congregation’s ministry immensely over the years.

Besides sharing the love of God in Jesus, Pastor Koehler enjoys his grandkids, a round of golf every now and then (his game needs a lot of work!), and the company of good friends around the grill.

Email: RevRGK3@GraceLutheranSAZ.org

Pastor Kassulke

Pastor Nathan Kassulke is the lead pastor at Grace-Tucson, with ministry responsibilities in fellowship and worship. He grew up in Minnesota and Wisconsin and was called to Grace after graduating from Wisconsin Lutheran Seminary in 2005. 

Pastor Kassulke and his wife, Beth, are blessed to have two daughters, Naomi and Anna, and two sons, Samuel and David. All are glad to be serving the Lord in Tucson and feel privileged to be serving alongside a wonderful "family" of Grace members.

Email: RevNPK@GraceLutheranSAZ.org

Pastor Patoka

Pastor Timothy Patoka is the youth and family pastor at Grace. He also has the privilege to be the campus pastor for WELS Tucson Campus Ministry (TCM) which is intended for college-aged young adults regardless if they are students or not. Pastor Patoka currently serves as the Spiritual Advisor for Mission to the Children and Grace's English as a Second Language (ESL) program. He began his ministry at Grace in 2016 after his graduation from Wisconsin Lutheran Seminary. 

Pastor Patoka is from all over the USA. With a father in the Air Force, he has called Wyoming, South Dakota, Arizona, and Virginia home over the years. During his undergraduate studies at Martin Luther College in New Ulm, MN, he met his future wife Katie. The two of them are happily married and enjoy the outdoors whenever possible. You can often find them biking on one of Tucson's many bicycle routes. Both of them are excited to call Tucson their home and look forward to many happy memories here.

Email: RevTLP@GraceLutheranSAZ.org

Pastor Heiman

Pastor Ryan Heiman serves as Grace’s mission pastor to Sahuarita. Pastor Heiman grew up in Fond du Lac, Wisconsin. He served a congregation in St. Paul, Minnesota from the time he graduated from Wisconsin Lutheran Seminary in 2002 until he accepted Grace's Call and joined us in Southern Arizona in 2016. 

Pastor Heiman and his wife Laura are blessed with four boys - Alexander, Owen, Emmitt, and Ingram. Pastor Heiman is an avid golfer who appreciates every opportunity he gets to be on the course, and he also enjoys working on projects around the house.

Email: RevRAH@GraceLutheranSAZ.org