Now in Tiburon at age 57, Thetford transitioned into a sort of semi-retirement, no longer accepting any demanding positions of heavy responsibility in either his professional life, or in his involvement with the ever growing readership of "ACIM". In California Thetford took on two part-time professional positions; one as a psychology consultant at Travis Air Force Base and the other as one of the directors of the "ACIM" related Center for Attitudinal Healing in Tiburon, as offered to him by his friend and fellow student of ACIM, Dr. Gerald Jampolsky.