“Transpersonal” is often used to refer to psychological categories that transcend the normal features of ordinary ego-functioning & deals with states or areas of consciousness beyond the limits of personal identity. That is, stages of human development through which a person's self-awareness extends beyond the personal. Among the psychological sciences that have studied transpersonal phenomena are Transpersonal psychology, Humanistic psychology and Near-Death Studies.
“Metaphysics” is the branch of philosophy investigating principles of reality transcending those of any particular science. It is concerned with explaining the ultimate nature of being and the cosmos.
A "Metaphysician” is, counterintuitively, the name of someone that studies and/or engages in the practice & teaching of metaphysical principles.
A “Metapsychologist” is practitioner who is trained & licensed in the practice of psychospiritual (spirit centered) therapy & counseling.