Meet Our Staff

Pastor Leslie O’Callaghan

Lead Pastor

Originally from the plains of northeastern Colorado, Pastor Leslie has enjoyed meeting the people of God all over the country. A 2004 grad of Concordia University River Forest and Lutheran Theological Southern Seminary (2011) in South Carolina, she served her first call in Sacramento, CA after serving as a chaplain for a large Lutheran school in Florida. In 2017 she moved back to Colorado where she served as Assistant to the Bishop for Faith Formation and Candidacy in the Rocky Mountain Synod. She is delighted to join the pastoral staff at Saint Andrew and looks forward to getting to know the congregation and what excited them about following Jesus in these bizarre days.  Pr Leslie enjoys coffee, her piano and banjo, reading, learning new hobbies without really mastering them, and anything JRR Tolkien related.

Pastor Leslie and her spouse Asher live in Marathon with their pup Francis and three cats, Agnes, Tillie, and Jack. They love the outdoors and are excited to explore this area of Wisconsin, especially when water is involved.

Contact Me

Joy Mitchell


Joy serves as the receptionist and congregational secretary. Her work is centered around developing and managing parish publications, coordination of worship participants, and maintenance of church records.
Contact Me

Jenna Diedrich

Jenna Diedrich

Faith Formation Coordinator

Jenna brings her experience and passion for youth development to help engage all members of SALC on their own faith formation journeys.
Contact Me

Jonathan Smith

Director of Worship and Music

A Wausau native, Jonathan has led music at worship services since 2013. Before returning to Wausau, he and his wife, Allycia, lived in the Twin Cities. In his personal time he loves to play piano, guitar, violin, mandolin, sing and along with spending quality time with his wife and their two cats.

His top goal is to know you and your family and to share God’s love through art to call God’s people to action.

Contact Me



Patrick Kieper

Facility Coordinator

Patrick lives to serve.  From event set-up to building maintenance he uses vast experience and knowledge to keep the Saint Andrew facility clean and running smoothly to help support the mission of the congregation.
Contact Me

Kerry Fehrman


Kerry maintains the financial giving records and assists members in setting up automated giving for the sake of supporting the mission of the congregation.
Contact Me



Leadership is provided by the Ministry Teams of Saint Andrew.  Each ministry focuses on one aspect of our life together.  One person from each of these ministry teams is appointed as a liaison to the Church Council.  The Church council gives general oversight to the life and activities of the congregation, designates benevolent gifts to be shared locally and globally, and supports the work of the pastors and staff.

Herb Heyne – Council President
Diane Goetsch – Council Vice President, Worship Ministry Liaison
Denise Skare – Secretary
Terri Fronek – Treasurer
Beth Hansen – Financial Secretary

Phil Bickley – Social Ministry Liaison
Randy Trollop – Personnel Ministry Liaison
Vickie Mrotek and Tammy Schilling – Fellowship/Outreach Ministry Liaison
Bob Wiederhoeft – Finance/Stewardship Ministry Liaison
Mark Clark – Communication Ministry Liaison
Jeanne Willems – Property Ministry Liaison
Pam Clark and Nick Josiger – Faith Formation Liaison