 Cardinal Roger Mahony, Archbishop of Los Angeles, was his principal consecrator, while Bishop Michael Driscoll (Bishop of Boise) and Bishop Joseph M. Sartoris were his principal co-consecrators.Wilkerson led the archdiocese's San Fernando Pastoral Region with 54 parishes, 12 high schools, two hospitals, and five missions.On July 21, 2015, his retirement was accepted by Pope Francis.