Our Staff

Casey McCormick

Casey McCormick, Lead Minister

Casey became the Associate Minister at MPCC in November, 2017 and our Lead Minister in September, 2019 .  He is very familiar with MPCC as he grew up in Mount Pulaski and was an active part of our congregation for several years.  He was ordained into ministry by our congregation on May 17, 2009.  He married Jen (McCubbin) who was also a part of MPCC in her growing up years.  They have two children, Harper and Evyn.  Casey served at the Athens Christian Church for 8 years as both a youth and associate minister.  He is very excited to be back home with the church and in the community.

Collin Schlotfeldt

Collin Schlotfeldt, Associate/Worship Minister

Collin became our part-time Worship Minister in August, 2019.  Upon graduating from Lincoln Christian Seminary with an MA in Formative Worship he transitioned to our full-time Associate/Worship Minister in June, 2020.  He is a graduate of Manhattan Christian College and Lincoln Christian Seminary.  We appreciate the joy, enthusiastic personality and creativity he brings to our congregation.

Nathan Sowers

Nathan Sowers, Student Minister

Nathan joined the Mount Pulaski Christian Church community as Student Minister in June of 2020. Nathan graduated from Central Christian College of the Bible in 2017, with a degree in Christian Counseling. Nathan previously served as youth minister at First Christian Church of Mountain Grove Christian church for two years. Nathan is joined by his Ozark Christian College graduate wife Annette who just gave birth to their first child, Avian. Welcome Sowers family! We are so glad you are here!


Amy Dyer

Amy Dyer, Office Manager

Amy has been serving as the office manager since March of 2017.  She is a graduate of Lincoln Christian College, and has been a member of MPCC for 17 years.  She and her husband Tracy have three boys (Josh, Nate and Drew) and a Shiba Inu named Suki. Having three boys of her own has prepared her for the job of taking care of the staff.

Rob & Jill Siebert

Rob & Jill Siebert, Childrens Minister

Rob and Jill have been members of the church since 2003 and came on staff at MPCC in 2007.  They are both graduates of Lincoln Christian College.  In addition to working at the church, Rob is employed at the Mount Pulaski Grade School, where he teaches fourth grade. Jill works at Christian Village in Lincoln, IL as an Administrative Assistant.  They have three  children:  Elizabeth, Emily, and Daniel.

Sarah Tierney

Sarah Tierney, Counseling Services

Sarah Tierney is a Licensed Professional Counselor with the State of Illinois, working at MPCC under the supervision of Living Hope Counseling Center.  She received a Masters in Counseling from Lincoln Christian University in May 2010, after completing her Bachelor's degree there, in Family Life Ministry in May 2007.  She has internship experience with both the guidance counseling department at Mt. Pulaski Grade School and Junior High, and also with the student counseling department at Lincoln College.  She worked for three years as a graduate teaching assistant for Dr. Nealy Brown, a position which afforded experiences in premarital and marital counseling and in Solution-Focused Brief Therapy (SFBT) techniques.  Since becoming licensed in 2011, Sarah has been counseling both adults and adolescents at Mt. Pulaski Christian Church primarily from an SFBT perspective, as well as providing semi-annual premarital seminars.  She was ordained by Mt. Pulaski Christian Church in 2011, joined Lincoln Pastoral Counseling Services in 2012, and most recently Living Hope Counseling Center in 2019.  She is a member of the American Association of Christian Counselors.