Msgr. John A. Esseff is a Roman Catholic priest in the Diocese of Scranton. Msgr. Esseff served as a retreat director and confessor to St. Teresa of Calcutta. He continues to offer direction and retreats for the sisters of the missionaries of charity around the world. Msgr. Esseff encountered St. Padre Pio, who would become a spiritual father to him. He has lived in areas around the world, serving in the Pontifical missions, a Catholic organization established by Pope St. John Paul II to bring the Good News to the world especially to the poor. Msgr. Esseff assisted the founders of the Institute for Priestly Formation and continues to serve as a spiritual director for the Institute. He continues to serve as a retreat leader and director to bishops, priests and sisters and seminarians, and other religious leaders around the world.