Alistair D. Sweet is director and senior psychotherapist with Meriden Psychotherapy, based in Belfast, United Kingdom. He is also an honorary lecturer and training supervisor in clinical psychology, Queen's University, Belfast. Before entering full-time private practice, he held posts as both senior psychotherapist and head of clinical services with the Northern Ireland Community Addiction Service. His research work on the addictions, disturbances of attachment, and earliest object relations has appeared internationally in a range of peer reviewed journals.