Mark Marble 

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Mark sensed God's call over 10 years ago to be the Lead Pastor at Castle Rock Bible Church. Mark is a Denver Seminary graduate and is currently working on his doctorate. With over 30 years of ministry experience, the role of pastor has never been more fulfilling.

Mark was married to the late Christie Marble for 33 years. She is now with Jesus after a two-year battle with ovarian cancer. Their marriage was blessed with two children, Brittney and Jesse.

Mark and his wife Shawna share a love for adventure and the outdoors, so much so that in the summer of 2017 they were married on top of a 14er. The adventure continues as together they raise their kids Sam, Bergetta, and Brock. With kids and grandkids, they now head up a tribe of 17. Mark has a passion for the Word of God and studies it many ways. By gifting, Mark is a teacher, bringing the Word of God to life with the primary purpose of helping the CRBC family to “love God, love people, and serve the world.”



Austin Brammer


Austin and Mandy have the awesome privilege of calling Colorado home and serving at Castle Rock Bible Church. They have two children, Lauralai and Phinehas. Austin and Mandy met in Colorado Springs where they married in 2011. Their story is one of redemptive purity, and they are called to lead young people to know the redeeming love of Father. 

Austin originally moved to Colorado Springs, CO in 2006 where he interned at Desperation Student Ministry at New Life Church. While at Desperation, he was involved with all aspects of Desperation’s national ministry from student services, internship programs, nation conferences, and international missions. After The Brammer’s married, they relocated in 2012, to Portland, OR to be closer to family. There they served at City Bible Church in volunteer capacities as the Young Adults Associate Pastors and Associate Student Pastors. They returned to Colorado in 2015 when Austin was brought on to serve as the Associate and Student Pastor at Castle Rock Bible Church.

Castle Rock Bible Church has become the Brammer’s family, and they are excited to see Douglas County explode with revival. Their mandate is to awaken hearts and live a life of purity; body, soul, and spirit. They are excited to be apart of what God is doing in Castle Rock.



Kim Trowell


Kim was born and raised in southeast Denver where she became a Christian in high school. She moved to Florida for several years where she married Ian and they started their family. They have since made Castle Rock their permanent home base to raise their four children: Elianna, Levi, Gracie, and most recently Asher, who they are in the lengthy process of adopting. They share a heart for reaching the broken and lost in their community.



Aaron McClain


Aaron McClain has come to Castle Rock and the Colorado Front Range by way of Atlanta, GA; St. Thomas, USVI; and Newark, NJ. Aaron has spent his whole life in church culture but truly came to know Jesus in August 2012. Shortly after, he heard the call on his life to serve God and His church as a Worship Pastor.

Aaron spent 9 years with the Salvation Army as a multi-instrumentalist, music teacher, youth worker, and worship leader. In 2017, the Salvation Army sponsored and released a 7-song album of original work written and arranged by Aaron McClain entitled “In Victory." Aaron has had the privilege of leading worship and being a missionary in Camden, New Jersey; Turks and Caicos Providenciales; Romania; and Moldova to name a few.

Aaron has a natural and unique skill of gently leading people into the presence of God and calling the church into intimate surrender to God’s love. His calling to the Front Range is to participate and help facilitate revival in this region. He is a worship leader with “Worship Mob” and a co-founder of Timeless Worship- a creative worshiper's collective. He is a lover of laughter, live music, and traveling with his community. Aaron currently resides in Colorado Springs, Colorado and is the Worship Pastor at Castle Rock Bible Church.



Mackenzie Grimme


Mackenzie grew up in the church in small-town Minnesota and always wanted to be a teacher when she was older. During her senior year in high school, the new youth director at her church had a big influence on her and encouraged her to pursue ministry. Mackenzie went to college in South Dakota to earn degrees in Religion and Mathematics. She continued her education further to earn a Masters in Youth Ministry.

Mackenzie and her husband, Matt, met in college and got married just before their senior year. They moved to Colorado right after graduating because of Matt’s job. They have two daughters, Anna and Lily, whom Mackenzie currently homeschools.

Mackenzie has served in different children’s and youth ministries since high school and is excited to be a part of these ministries at CRBC.