Jack and Julie have served with Camino Global since 1979. They ministered in church planting in Guadalajara, Mexico. Later, Jack served as Director of Puebla Bible Seminary. In 1998 they moved to the Philadelphia area, becoming involved in missions mobilization and Hispanic ministries.

Northeast USA Team Leader

Since 2011 Jack has been the leader of Camino Global's Northeast USA team.

Prior to serving with Camino Global, Jack served for six years as Assistant Pastor at Minnetex Community Church in Houston, TX. Jack and Julie's sending churches are Calvary Church in Lancaster, PA and Davisville Church in Southampton, PA. The O'Briens currently reside in Southampton, PA. They have five children and six grandchildren.