"While we were still sinners, Christ died for us." - Romans 5:8

Brookfield Lutheran Church Staff

Pastoral Staff


Rev. Robert Mrosko

Senior Pastor


Rev. Robert Andrew Mrosko was born in Porterville, California, the third of four children.  He was raised in Cornelius, Oregon, and Clear Lake, Iowa.  Robert attended Concordia University Wisconsin and graduated in 1993 with a degree in Pastoral Ministry/Theological Languages.  While at Concordia Robert met Amy Stults, and they married in June 1993.  They moved to St. Louis to attend Concordia Seminary, from which Robert graduated in 1997.

Robert served his vicarage at Prince of Peace Lutheran Church in Spring Lake Park, Minnesota.  He received his first call to the ministry to St. Mark Lutheran Church in Ruskin, Nebraska (1997-2001).  Rob and Amy then moved to Thomasboro, Illinois, to serve at Peace Lutheran Church (2001-2007). 

Robert received the call to St. Paul’s Lutheran Church in Decatur, Illinois, where he served as Executive Pastor (2007-2012).

God has blessed Robert and Amy with five children: Bethany, Joshua, Anna and twins Malachi and Micah.  Amy is a wonderful teacher and finds great joy homeschooling their children.  She is also a gifted musician and especially enjoys playing and directing handbells and playing the organ.

The Mrosko family is excited to join the people of God in the mission and ministry of Brookfield Lutheran Church.




Ministry Staff


Mary Stafford

Director of Education Ministries


Mary is the Director of Life in Jesus Development at BLC. She is a certified Director of Christian Education as well as an Elementary Education Teacher from Concordia University in River Forest, IL. She came to us in 2004 from Immanuel Lutheran Church in Crystal Lake, IL, where she served for 13 years as the director of youth and education ministries. Mary oversees the Life in Jesus Kids, Life in Jesus Youth, Vacation Bible School, LIJ Mission Trip, Family Ministry Events, Educational Seminars and Retreats, Kids Connection, Life in Jesus Adult Education on Sunday Mornings, Tuition Assistance Program and Children's Sermons. She also works with the other team members on many all-Church events such as Service of Death.

Mary lives in New Berlin. She enjoys movies, dinners out and spending time with family. Mary also enjoys reading, the health club, downhill skiing in the winter and hiking in the summer.



Nathan Ballard

Director of Youth Ministry


Nathan Ballard grew up in Milwaukee and attended Concordia University - WI where he earned his degree in Lay Ministry and Theology. He served for 8 years as a volunteer youth leader at Mount Olive in Milwaukee. It was there that he met his wife, Erin. Nathan's passion for youth ministry started as a teenager. As a result of the effect youth ministry had on him, Nathan seeks to support and equip youth, pointing them to Jesus as they navigate some of the most confusing years of their lives.

In his free time, Nathan leads a charity organization that provides real-life superhero experiences to kids. This opportunity allows him to be Batman and bring smiles to the faces of children who are hurting, healing, and in need. Nathan also enjoys comic books, film, good coffee, and the Packers.



Duane Tweeten

Director of Discipleship & Outreach


Duane serves as Brookfield Lutheran Church's Director of Discipleship and Outreach. After graduating from Augsburg College, Duane taught 5th and 6th grades in both Lutheran and public schools. He later received a colloquy in Director of Christian Education at Concordia University-St. Paul. In 2002, Duane received his Masters in Education from Concordia University-Wisconsin. Duane has served as a Director of Christian Education at BLC and in Atlanta, GA, as well as traveling as a Christian Education Specialist with Concordia Publishing House.

Duane and his wife Dee Dee are the parents of four children, Bethany, Rachel, Nathan and Julia.



Joel Wetzstein

Director of Worship and Music


Joel Wetzstein was born in Belem, Brazil as a “son of a preacher man”. They lived there for 8 years before moving to Central Illinois for 2 years, then  Panama City, Panama, R.P., where his family lived for 17 years. Joel studied at Concordia University in Irvine, CA and graduated in 1991. He then lived in Chicago for 2 years before continuing his education at Concordia Seminary in St. Louis, MO where he met his wife, Jodie, and married her in 1997.  Joel spent almost 8 years as the co-founder of Crosspoint Lutheran Church, a Lutheran church for the un-churched in Katy, TX. He then spent almost 8 years at Salem Lutheran Church in Tomball, TX as the Programming Director of Worship Arts and then as the Director of Integrated Communications.

In June 2013, Joel & his family moved to Wisconsin to join the ministry team as the Director of Worship & Music at Brookfield Lutheran Church. It is his calling to help people (re)discover Jesus and his unconditional love though teaching and worship – so we can all live out a new life in Him as the foundation of our identity all the while helping to ignite an outwardly focused vision to reach people in our communities.

Joel and his wife Jodie have three children- Avery, Kaiden and Makena.






Sherry Marose

Choir Director & Traditional Worship Planner


Matt Tucker

Technical Arts Director


Sherrill Marrs

Caring Ministry Nurse


Sherrill began Parish Nursing at Brookfield Lutheran Church in 1996 and is the facilitator of the BLC Caring Ministry Committee. She is a graduate of Columbia Hospital School of Nursing and earned her Bachelor of Science and Master of Science degrees in Hospital Administration from St. Francis University. She has also completed the Marquette University Parish Nurse program.

Sherrill and her husband, Jack have been members of BLC since 1978. They have three adult sons, John, Rob and Jay and three grandchildren, Maddy, John W. and Aiden.




Administrative Staff

Nancy Lippert

Caring Ministry Nurse

Mark Jaeger

Executive Director








Lori Sansoucie

Integrated Communications Coordinator



Bonnie Halverson

Church Office Assistant



Tim Rondone




Gerrie Marincic




Nicole Strelow

Child Care Coordinator




Contact the  Church Office

Please send general inquiries to the church office using the form below.

Please do not send messages containing personal or private information.  Call the church office at (262) 783-4270 to schedule an appointment with one of our pastors regarding sensitive matters.

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