Theis Dencker

Clinical Psychologist

Theis offers appointments (via telehealth) on Saturdays.

Theis believes in creating a safe, non-judgemental environment for his work with clients. He believes it is important for the therapist to try to be 100 % present with the client; whatever they are going through or have gone through and for the client to feel safe, validated and authentically listened to, in that space. His approach is to work in a collaborative and gradual manner, moving at a pace that feels safe for the client.

Treatment Approaches

Theis believes it is important to tailor the therapy used in sessions to the particular issues faced by the client, balancing this with the client’s preference. His goal is that he and the client co-create the session and jointly decide the therapeutic direction going forth.

He has a strong interest in Third Wave Psychotherapies including Acceptance and Commitment therapy (ACT), Dialectical Behaviour Therapy (DBT) and Mindfulness based interventions (MBIs). He has trained in Schema Therapy; has an interest in complex childhood trauma and has completed training with the Blue Knot Foundation, a trauma focused organization to help inform his clinical practice.

Theis utilises:

  • Acceptance and Commitment Therapy
  • Dialectical Behaviour Therapy
  • Motivational Interviewing
  • Cognitive Behavioural Therapy
  • Mindfulness based therapy strategies
  • Schema Therapy

Presenting Issues

Theis sees adults, presenting with a wide range of issues, including:

  • Complex childhood trauma
  • Anxiety
  • Depression
  • OCD
  • Drug and alcohol related addiction issues
  • Personality disorders including borderline personality disorder
  • Self-harm behaviours
  • Stress management
  • Chronic severe pain
  • Self-esteem issues
  • Work related stressors and/or conflicts
  • Sleep related issues

Qualifications and experience

Honours degree in Psychology, University of Wollongong
Masters of Psychology (Clinical), University of Sydney
Australian Health Practitioner Regulation Agency Registration Number (PSY0001000477)

Theis has extensive experience working in a number of government services with adults with anxiety, depression, OCD, psychosis, intellectual disability, personality disorders, self-harming behaviours, anger related issues, addictions and complex childhood trauma.

Please contact the clinic on (02) 8937 0667 to book an appointment with Theis.