Church Staff

Joseph Naumann


Pastor Joe Naumann is a fifth generation pastor who grew up largely in Alaska and Wisconsin. He was baptized at Mount Olive Lutheran Church in Detroit Lakes, MN and was confirmed at Luther Memorial Church in Fond du Lac, WI. He attended high school at Immanuel Lutheran High School in Eau Claire, graduating in 2008.

In 2013, he graduated from Immanuel Lutheran College in with a Pre-Theological degree. In 2014, he vicared under Pastor Wilke at Gethsemane Lutheran Church in Saginaw, MI. In 2015, he vicared under Pastor Dave Schierenbeck at Berea Lutheran Church in Inver Grove Heights, MN. In 2016, He graduated from Immanuel Lutheran Seminary. That same year, he received the call to serve as Associate Pastor at Immanuel Evangelical Lutheran Church in Mankato, MN. 

Pastor Naumann married Rachel Sydow in 2014. He and Rachel have been blessed with four children: Eleanor, Olivia, Samson, and Adelaide.

Mrs. Hilary Lien

School Staff

Brandan Heinze


Principal Heinze joined the staff of Immanuel in 2017.  A 2004 alumnus of Immanuel, he graduated Minnesota State University, Mankato in 2008 with a degree in Mathematics Education.  He taught 7-12 mathematics for seven years at Comfrey Public School before teaching college math and statisitics courses at Minnesota State University, Mankato for two years.  He earned a Master of Science degree in Mathematics and Statistics from Minnesota State University, Mankato in 2018.  Mr. Heinze has been at Immanuel since 2017 and has been principal since 2019.

Beth Greve


Mrs. Greve joined the Immanuel staff in 2013.  She graduated from Ripon College in Ripon, WI, with a major in German Education and a minor in English Education.  She taught middle school English for five years in Page, AZ, before teaching ninth grade English for four years in Phoenix, AZ.  Currently, Ms. Olmanson teaches English 7-10, English 11-12 (British and American Literature), and German 1 and 2.  She is also in charge of Immanuel’s online newspaper as well as the annual yearbook.

Benjamin Hanel


Benjamin Hanel graduated high school in 2001 from Immanuel Lutheran School, Mankato. After that, he served eight years Active Duty Air Force as a Mechanic and Technician. Two of those years were spent writing and conducting a training curriculum for new Airmen to be integrated into their new career fields. He graduated from Grand Canyon University in Phoenix, AZ with a BA in History.  He has a passion for History and seeks to show students the importance that it has their everyday life and how it reveals God’s hand in our lives. Mr. Hanel organizes the annual junior D.C. tour. He teaches high school history, geography, social studies, and computer.

Julie Busch


Julie Busch has been teaching at Immanuel since 2011. Prior to this, she taught junior high math at Waseca Junior High School. She has also coached swimming, volleyball, and basketball in the Mankato community. Mrs. Busch is an alumnus of Immanuel Lutheran School. She received her BS in Teaching Mathematics from MSU in 2000 with a minor in athletic coaching. Mrs. Busch has been active in the school’s athletic program. She served as an Athletic Director from 2008-2012, has coached volleyball and basketball, and is the director of the Christian Athletic League Basketball Tournament held yearly at Immanuel.

Matthew Kranz


Matthew Kranz has taught at Immanuel since 2015. He primarily focuses on PE, Health, Religion, and Finance.  He graduated from University of Wisconsin – Eau Claire in 2014 with a license to teach 1-8. Matthew is a graduate of Immanuel Lutheran High School located in Eau Claire, Wisconsin, and was a member of our sister congregation, Messiah Lutheran for most of his life.  He has coached various sports in the grade school and high school levels and hopes to become a part of the ILS program.  His wish for his students is that they grow as individuals in life, and as children of God in spirit.

Lane Fischer


Lane Fischer’s primary teaching responsibilities include teaching Grades 3 & 4, Music 7/8, and High School Music Appreciation. Mr. Fischer also directs ILHS Choir and the handbell choirs. Mr. Fischer is an alumnus of Immanuel Lutheran High School. He received two BS degrees–both in Elementary Education–one from Immanuel Lutheran College in Eau Claire, WI, and a second from MSU Mankato. In addition, Mr. Fischer has his MS in Curriculum and Instruction from MSU Mankato.

Michael J Wheaton


Michael Wheaton was called to teach Grades 1 & 2 at Immanuel in 1997. Prior to this, Mr. Wheaton taught in the Mankato and Owatonna Public School Systems. He also was the assistant coach for the Owatonna H.S. Varsity Girls’ Gymnastics team from 1995-97. Mr. Wheaton has been a lifelong member of Immanuel – Mankato, and is an alumnus of the Elementary and High School Programs. He graduated from Immanuel High School in 1990. He received his Bachelor of Science Degree in Elementary Education and a Minor in Mathematics from Mankato State University in 1995. Mr. Wheaton has been very active with our High School Drama Club. He was a Director from 1999-2003. Since then he has become the Producer (2003-present).

Stephanie Roettger


Stephanie Roettger was called to teach 5th and 6th grade in 2021. She graduated with a degree in Elementary Education from Minnesota State University in Mankato in 2014, and is licensed to teach K-6. Stephanie is a graduate of Immanuel Lutheran School, and has continued to be involved in both the church and school. She teaches Sunday School at the nursery level and directs plays for the High School Drama Club. Stephanie’s desire is that the students of Immanuel will grow each day not only in knowledge, but in love and faithfulness for God. 

Holly Harris


Holly Harris serves as the K-2 Teachers’ Aide. She also teaches Art class in the grade school. Holly would describe herself as an introvert who loves to spend her evenings at home. She also loves movies, art, and animals so talk to her about these anytime!

Erika Hart


Erika Hart was called to teach Kindergarten in 2021. She graduated from St. John Fischer College with honors. She earned a Bachelor of Science degree in childhood education and special education. She went on to receive her licensure and teach at a Christian school in Virginia. Erika taught first grade and sixth grade. As a dimension of the foundation for lifelong learning, Erika is a strong advocate of improving children’s early literacy development. 

Kevin Schrader


Kevin Schrader was called to teach high school Spanish, math, and science in 2021. He graduated in 2018 from the University of Minnesota – Twin Cities with a Bachelor’s in Aerospace Engineering and Mechanics. He spent three years as an engineer for National Instruments in Austin, TX, before accepting the call to teach and moving to Mankato. Currently, Kevin teaches Spanish I & II, Physics, Chemistry, Precalculus, Biology, and Physical Science. He hopes to dispel the idea that science and the Word of God are incompatible and instill his students with a confidence in the unshakeable Word of God. 

Deb Owens

Band Director, 5-12

Deb Owens is an alumnus of Immanuel Lutheran School. She is a past percussion instructor for Mankato “77Lancers” and has a bachelor’s degree in music from Mankato State University.

Colleen Kranz

Music K-6, CHoir
teachers' aide

Colleen Kranz is an alum of Immanuel Lutheran. She graduated from Bethany Lutheran College in Mankato and directs the Immanuel choirs, teaches music classes, and directs handbells. She also serves as the 3-6th grade teachers aide and offers piano lessons after school. 

Amanda Harris


Amanda Harris is a 1991 graduate of Immanuel Lutheran School. She previously taught elementary Phy. Ed. for 11 years and served as the elementary athletic director. She is currently the school secretary.

Marie Casto

Athletic Director

Marie Casto is an alumnus of Immanuel Lutheran School. She supports the school and the sports program in many ways and served as school secretary for a number of years. 

Helena Stevens

Career and Guidance Counselor

Helena Stevens is a district counselor for ISD77. She currently is an Associate Professor for Clinical Mental Health Counseling in the Graduate Programs department at Bethany.