Jeunesse ouvrière chrétienne
Fitzmaurice encouraged participation in Catholic Charities, and founded the Catholic Welfare Guild, Catholic Youth Organization, Society for the Propagation of the Faith, and Knights of Columbus, as well as the Catholic Interracial Council, Catholic Forum of the Air, Catholic Television Guild, Diocesan Book Forum, Catholic Education Guild, and Young Christian Workers. In 1945, he ordered the Catholic parents of public school students to prohibit their children from attending sex education courses, which he described as "offensive to the Catholic conscience."