Fr. John Klein serves as Chaplain and Spiritual Director for Regnum Christi’s college and young adult ministry in Atlanta, GA, as well as Spiritual Director at the Georgia Tech Catholic Center in downtown Atlanta, where he guides college students in their daily growth in faith. Additionally, he works as Head Chaplain for Mercy Missions Atlanta, a non-profit missionary organization dedicated to youth street evangelization and homeless ministry throughout the streets of Atlanta.

Originally hailing from St. Louis, MO, Fr. John pursued studies in music production in Nashville, TN, before answering the call to join the Legionaries of Christ in 2006. Since then, he has been deeply involved in creating music and nurturing young Catholic musicians. In 2020, he founded the Regnum Christi Music Collective, a music ministry dedicated to composing music for evangelization purposes and providing formation for musicians.