Brian is a Systemic Family Psychotherapist. He has 21 year’s experience of working collaboratively with adolescents, couples and families across the community, voluntary and statutory sectors, as well as in private practice.

Brian earned his M.Sc. in Systemic Family Psychotherapy at the Department of Child and Family Psychiatry, Mater University Hospital and University College Dublin.

Brian has spent a number of years teaching accredited undergraduate and postgraduate degree programmes in psychological theory and therapy. He has designed three master programmes, two which have been validated by Middlesex University in London and the third validated in Malta in collaboration with the Institute of Family Therapy and Systemic Practice in Malta.

Brian works with his client(s) in the context of their whole lives and takes into account a person’s relationships, internal dialogue, history, work and social settings. He aims to assist the adolescent, individual, couple or family to come to their own satisfactory understandings or actions that will allow them to manage whatever issue troubles them.

The consultations are client led, confidential, collaborative and non-judgemental. Brian aims to engage clients in a conversation that offers the individual, adolescent, couple or family alternative stories or descriptions to the ‘stuck’ or ‘pathological’ ones they currently find themselves in. To contact Brian, please click here.

One area of Brian’s interest, research and practice relates to children resisting contact with a previously loved parent in the context of high conflict divorce and separations in Ireland, often referred to as contact resistance, maladaptive gatekeeping or parental Parental Alienation.

Brian has conducted the only published Irish study exploring Parental Alienation with ethical permissions from the Human Research Ethics Committee at University College Dublin. He has been published in international peer reviewed Journals regarding the theme of Parental Alienation.

He is the founding editor of the European Journal of Parental Alienation Practice. See link here:

Brian is co-director of the first European masters degree programme in Parental Alienation Studies. The first cohort commenced in September 2021 with learners from social, legal and mental health professions from Russia, China, Iceland, US, New Zealand, Canada, Malta, UK and Ireland for more information, see here: 

Additionally, he has delivered his research findings at national and international post graduate (Doctoral) research conferences. His expertise in the area of Parental Alienation means he is often requested to act as an expert witness in complex private family law proceedings (section 47’s) where parental alienation is considered to be a factor.


Brian O’Sullivan Consultant Systemic Family Psychotherapist

M.Sc. (Syst. Psych)