All of our psychologists have trained for at least six years, completing both undergraduate and postgraduate qualifications at either a Masters or PhD level, or both. In addition, all of our psychologists maintain their knowledge through a commitment to ongoing professional development.

Dr John Forbes

John is the owner and manager of Delta Psychology. As well as extensive clinical experience with adults and children, John has worked in hospital, community, and corporate environments – including as the Assistant Director of the WA Police Health and Welfare Branch and the Mental Health and Chronic Disease Program Manager at the Osborne General Practice Network. His areas of special interest include: positive psychology, optimal psychological functioning, post-traumatic stress disorder, grief, substance use, EMDR, and hypnosis. John also provides training to organisations such as the WA Health Department on topics such as Motivational Interviewing, and has taught in the undergraduate and postgraduate psychology programs at Edith Cowan University.

John is an approved Psychology Board of Australia Supervisor, and is able to provide Principle or Secondary supervision for all pathways: Work in Addition to Higher Degree, 4+2 Internships, Higher Degree Programs, Clinical Psychology Registrar, and 5+1 Internships.

John can be contacted at or on 0403 247 786.

Dr Krystle Borg

Krystle works on Tuesdays and Wednesdays. She is a Clinical Psychologist and a Forensic Psychologist, and has experience working within hospital, correctional, corporate and community settings. Krystle has experience working within a multi-disciplinary team, conducting group therapy, working with couples, responding to critical incidents, completing assessments and conducting individual therapy. She has worked with Delta Psychology since December 2008. Krystle’s areas of special interest include: eating disorders, self-esteem issues, relationship issues, grief, anxiety disorders, and depression. Krystle can be contacted at or on 0401 663 926

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Dr Kate Cruise

Kate is a Clinical Psychologist Registrar who has experience working with children and adults within a community health setting. She is person-centred in her approach to therapy and integrates a range ofevidence-based practice methods, including Cognitive Behaviour Therapy (CBT), Acceptance and Commitment Therapy (ACT), Mindfulness and Relaxation, psycho-education, and Interpersonal Therapy (IPT) to suit individual treatment goals. Kate’s areas of special interest include: attachment and parenting difficulties, trauma, anxiety related disorders, depression, sleep difficulties, smoking cessation, chronic health conditions (including pain), self-esteem, and interpersonal difficulties.  Kate works on a Tuesday and Wednesday and can be contacted at or on 0434 129 485.