The Secular Institute of Missionaries of the Kingship of Christ (SIM), an international institute of pontifical right is located in more than 30 countries throughout the world.The life is one of total consecration to God in the spirit of St. Francis in order to fulfill a mission in the world. SIM members do not live in community or share a common apostolate.

The name "Missionaries of the Kingship of Christ" reminds its members of the purpose of their consecration - the mission of giving witness to Christ, first born of all creatures, Lord of the universe and center of history.  Missionaries collaborate in spreading the reign of God.  They become an original sign of the mission of the Church in the world. Through lives of witness and service, members become a leaven to transform the world from within.