Rosica was appointed by the Canadian Conference of Catholic Bishops as the National Director and Chief Executive Officer of the 17th World Youth Day 2002 in Toronto. The theme of the World Youth Day was "You are the salt of the earth... you are the light of the world." Shortly after the World Youth Day, Thomas Rosica was approached by the founder of St. Joseph Communications, Gaetano Gagliano, to run a religious television network. The new television station was named "Salt + Light Television" after the theme of the World Youth Day 2002 and began its broadcast on July 1, 2003 with only two employees.