The institute has provinces or delegations in Italy, the Philippines, the United States, Mexico, Peru, Brazil, Bolivia, India, Poland, and Nigeria.

Joseph Marello's original intent was to found a simple association of men dedicated to a common spirituality, serving the local church in catechesis and assisting local clergy, but not publicly professing canonical vows in a religious institute.

On March 14, 1878, he opened a house for what he called the "Company of Saint Joseph" and invited four candidates to be members.

Common apostolates include education and catechesis of youth, parish ministry, serving the poor and underprivileged, and orphanages.

Oblates of St. Joseph are bound by their Rule to live in community, unless exceptional permission is granted.