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Our Staff

Rev. Derek M. Zeyl, MDiv, DMin candidate + Lead Pastor

Derek serves as the Lead Pastor and contributes to our formation through preaching, worship, and strategic leadership. He mentors our ministry staff and leadership teams and loves to encourage people in all stages of their spiritual journey to passionately live out God’s Story. A student of missions and the church, Derek is a doctoral candidate in missional leadership at Missio Seminary in Philadelphia. In his free time, he enjoys home improvement projects, reading historical biography, cooking new recipes, playing his guitar, and following the Michigan Wolverines.

Caleb Vanderhill, BA + Director of Youth & Children's Formation

Caleb helps equip, encourage, develop, and grow a culture of ongoing faith formation for our children and youth at Third Church through providing strategic oversight for the children (birth through 6th grade) and youth (7th through 12th grade) faith formation ministries.


Rev. Agshin Jafarov, MDiv, ThM + Director of Outreach & Diaconal Ministries

Agshin helps Third to live out the Gospel in both Word and Deed expressions in Kalamazoo, the surrounding communities, and beyond He does this by providing leadership to our local and global missional ministries as well as provide support to Third's Deacons in their work of compassion, justice, and mercy.

Andi Potter, BS + Office Administrator

Andi coordinates the day-to-day operations of Third Church, supporting other staff and ministry leaders, as well as keeping everything organized. She is an accessible resource for guests and if you visit our office, she will greet you with a smile! Andi also manages content for Third's weekly newsletters and works to tell the stories of our congregation and community.


Jane Lockwood, BA + Facilities Manager

Jane grew up in Williamston, and is a proud graduate of Michigan State University. After moving to Kalamazoo in 1990, Jane worked for Catholic Diocese before coming to 3rd CRC. Jane oversees facility cleaning, maintenance, and scheduling, as well as lending her musical talents to Sunday services. Jane loves spending time at the lake and driving her convertible with a poodle in the backseat.