Meet Our Priests





Fr. Pat Mulcahy - Pastor

Fr. David MedowBio coming soon!

Fr. David Mowry - Parochial Vicar

Father David Mowry was born July 11, 1987, to Joan and Keith and was baptized on October 25 of the same year. After a few years in Elmhurst and a move to the Washington D.C. area, his family returned to Illinois and settled in Glen Ellyn. Fr. Mowry attended parochial school at his home parish of St. Petronille and graduated from there in 2001. He began to discern a call to priesthood in his junior year at Glenbard West High School, and, in the fall of 2005, he entered St. John Vianney College Seminary at the University of St. Thomas in Saint Paul, MN. He graduated from the University of St. Thomas in 2009, and entered Mundelein Seminary in the fall of the same year. 

He was ordained to the diaconate on June 2, 2012, and served as a deacon at St. Joseph Catholic Church in Addison. His ordination to the priesthood came on May 18, 2013, and in June of that year he began his assignment to Immaculate Conception in Elmhurst as associate pastor until 2016. His brother Trevor serves as co-principal oboe for the United States Marine Band, and his sister Elizabeth attends high school at Glenbard West.

Fr. Mowry has been serving St. Mary Immaculate Parish since June of 2016.



Fr. John Regan - Priest-in-Residence

Father John Regan has been a priest-in-residence at St. Mary Immaculate since June 2012.  Born in 1963, he grew up in Peotone and was the youngest of four children in his family that actively participated at St. Paul the Apostle Church.  After receiving his degree in mathematics from the University of Notre Dame, he entered Mundelein Seminary to prepare for priesthood for the Joliet Diocese.  Father was ordained in 1989 and began serving as a parochial vicar at St. Liborius Parish, in Steger.  From 1993 to 2006 he served as the Vocation Director for the Joliet Diocese.  In 2006 he was named pastor of St. Walter Parish, in Roselle. 

In 2008, Father Regan was placed on a leave of absence from public priestly ministry to address a gambling addiction and face the legal consequences of criminal financial actions at St. Walter Parish.  He returned to ministry in 2012, first briefly serving at St. Jude Parish in Joliet in March to make the transition back to parish life, then more permanently at St. Mary Immaculate in June 2012. 

Of his situation, Father Regan says, “The journey of addiction and recovery has been one of incredible grace. Because of my addiction, I know what sin, shame, public humiliation and scandal are.  I have experienced and felt them. But because of God’s grace and my 12-step recovery group, I also know what redemption, forgiveness, and God’s mercy are.  I know quite personally the amazing grace of another chance. I have a keen interest in the Church’s outreach to those who are seeking a second chance in recovery.”

Father Regan enjoys celebrating Christ’s presence in the daily situations of our lives and sharing the Good News of God’s love and mercy.  If you have any questions about his situation please feel free to ask him.



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