This is achieved:

Through Parish ministry, Spiritual care, and Chaplaincy in collaboration with the catholic parishes and dioceses in the United States and Canada.

By providing spiritual, and temporal support to the missions in the developing countries by sponsoring the Formation of seminarians and missionaries, helping missionary enterprises like educational, health and charitable activities through prayer, monetary contributions, contacts and visits;

By facilitating missionary collaboration between catholic individuals, parishes and dioceses with missions in the developing countries, through regular sharing of news, exchange of information and active involvement.

MST in USA is the American delegation of The Missionary Society of St. Thomas, the Apostle, India (MST), which is an indigenous missionary society committed to mission ad gentes in India and worldwide.