Gary Kirst - Senior Pastor

Gary has been our Senior Pastor since 1990. He’s been married to Linda for 35 years, and they have four adult children. Gary loves serving the Lord and his people, enjoys playing the trumpet, golf, and reading about history. He’s a graduate of Trinity Evangelical Divinity School (M.Div. 1990, D.Min. 2019). Linda works at a bank in Dubuque in retirement planning and loves helping to bring people together in our church body. And… they’re Packer fans.


Adam Mostert - Associate Pastor

Adam has been our Associate Pastor since he graduated from Bethlehem College and Seminary (BCS) with an M.Div in May 2015. He earned his Bachelor’s degree in Bible Exposition and Theology from Emmaus Bible College, where he also met his wife Abi and they married in 2009. Adam loves spending time with Abi and and their four young boys. He also likes to play and watch basketball, read history and theology, study and preach God’s word, drink coffee, and spend time with people.


Tim Wagner - Youth Pastor

Tim is a graduate of Emmaus Bible College. He serves as the youth pastor (since 2005). He enjoys helping students see the glory of Jesus Christ in the Word of God, realize the importance of the local church and catch a vision for the Gospel need around the world. Tim and his wife April have 4 kids. They enjoy hikes, ice cream, reading, and inventing new games to play.



Jeff Rouse

Jeff and his wife Charity live in Dubuque and have four young children. Jeff works as an engineer in Dubuque and Charity is a songwriter, writing and performing songs that seek to point folks to God’s grace in Christ. They love going on family adventures. They’ve been members at GBC since 2008.

Tim Vosberg

Tim has a degree in Animal Science, he started his career in a white collar position in the suburbs of Chicago. Now he and his wife of 20 years own and operate an organic dairy farm near Cuba City, WI with their six children (all at home). Both Tim and Heidi came to saving faith after marriage and have a zeal for sharing the Good News with whoever crosses their path. The Vosberg's have been members of GBC since 2014.

Mark Benedict

Mark and his wife of 32 years, Sandy, live in Dubuque and have five children and two grandchildren. Besides spending time with his family, Mark loves God's Word, the Gospel, and the Church. He also enjoys working on mechanical projects, like cars, and he enjoys watching football. Mark and Sandy have been members of GBC since 2001.


Megan Baily - Administrative Coordinator

Megan graduated from Emmaus Bible College in May of 2020, and has recently started to serve in this role at GBC. She loves serving the Lord through serving his people. She also loves coffee and traveling!