- Campbell is a Consultant Infant and Child Psychiatrist at the Royal Childrens Hospital, Melbourne and Honorary Principal Fellow in the Department of Psychiatry at the University of Melbourne. He and colleagues have established a Graduate Diploma and a Masters Course in Infant and Parent Mental Health. This course developed out of his longstanding experience in paediatric consultation liaison psychiatry and work in infant parent psychotherapy. He has a special interest in the understanding of the inner world of the baby, particularly as it informs therapeutic work with infants and their parents. With colleagues he has developed models of working in therapeutic groups with troubled parents and infants. He has been a consultant psychiatrist at the Victorian Aboriginal Health Service has also been involved in the establishment of the Koori Kids Mental Health Network. He has worked with NT child mental health services in Central Australia. He is a member of the Board of Directors of the World Association for Infant Mental Health and he has been a participant in and organizer of a number of local and international conferences and activities in the field of infant mental health.