Fr. Aaron Siehr
Associate Pastor
Office: 262-367-0800
Fr. Aaron Siehr was ordained to the priesthood for the Archdiocese of Milwaukee on May 17th, 2025 by the Most Reverend Jeffrey S. Grob–Archbishop of Milwaukee. Fr. Aaron grew up at St. Dominic Parish in Brookfield, where he received the sacraments of initiation and attended grade school. Fr. Aaron attended Catholic Memorial High School in Waukesha where he graduated in 2015. Fr. Aaron attended the University of Wisconsin-Madison, where he earned an undergraduate degree in Rehabilitation Psychology. During his time in Madison, Fr. Aaron was blessed by the dynamic ministry of St. Paul’s University Catholic Center. Here, Fr. Aaron was encouraged by the example of many holy peers and holy priests. Thanks to their example and an atmosphere of prayer, Fr. Aaron discerned God’s call and invitation to the priesthood of Jesus Christ. Fr. Aaron entered seminary formation at St. Francis de Sales Seminary in Fall of 2019, and he earned his Masters of Divinity degree in May 2025. After his ordination, Fr. Aaron was assigned to St. Charles Parish in Hartland, WI.