Previously 'Wellington Street Psychology'

The team at Q Psychology (previously Wellington Street Psychology – name changed in July 2022) is passionate about delivering the highest quality, best-practice mental health support to clients. Q Psychology supports a diverse range of clients and is Melbourne’s leading private psychology practice for the LGBTQIAP+ community. Our guiding values are Community, Advocacy, Inclusion, and Leadership.

Our therapists take an adaptive, authentic, and creative approach to therapy. We support clients to address various difficulties such as depression, anxiety, stress- and adjustment-related issues, trauma and PTSD, sexuality, gender dysphoria and gender diversity, addiction issues, phobias, OCD, issues of low self-esteem/self-worth, relationship issues, and personality disorders, and many others.

Dr. David H Demmer

Director & Clinical Psychologist
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Dave is a leader in LGBTQIAP+ mental health and therapy. He has spent his career supporting gender and sexually diverse communities. His approach to therapy is collaborative, authentic, and focused on emotional change. His practice focuses on Schema Therapy, ACT, CBT, and clinical hypnosis.

Ms. Steph Sier

Senior Therapist / MHASW
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Steph is a senior clinician and therapist at Q Psychology, and a mental health accredited social worker. She has an extensive background working in inpatient and outpatient mental health programs and helps guide and support the clinical team at Q Psychology.

Dr. Bella Marker

Senior Clinical Psychologist
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Bella adopts a compassionate and holistic approach when working with clients. She is trained in Compassion-Focussed Therapy, and believes in the importance of empathy, collaboration, and a non-judgmental attitude.

Carina Allen

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Carina adopts a compassionate, warm and collaborative approach to therapy. She prioritises building a trusting and mutually respectful relationship to explore the needs and challenges of her clients.

Kefu Xie

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Kefu is experienced working with adults, youth and families. He adopts a collaborative, non-judgemental, and empathetic approach to therapy. Kefu has experience treating a variety of problems including depression, anxiety, substance-related issues, and trauma.

Ridhima Tandon

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Ridhima takes a warm, welcoming, and person-centred approach to therapy and is experienced in CBT, mindfulness, and trauma-informed therapy. She is sensitive to both individualistic and relational cultures allowing her to work with people from a range of backgrounds and across multicultural issues.

Amy Bortz

Clinical Psychologist
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Amy holds particular experience in working with adolescents and adults experiencing eating disorders, body image difficulties, and anxiety and mood disorders.

James Traugott

Provisional Psychologist
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James is a registered provisional psychologist. He offers a therapeutic relationship that provides a secure place of appreciation, challenge, change, and value. He runs an evidence based practice focused on practical solutions.

Jess Du

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Jessica has experience working with children, adolescents, and young adults. She works across various psychological difficulties (depression, anxiety, PTSD/trauma, personality disorders, self-esteem issues, and many others) and various psychological therapies (including CBT, DBT, motivational interviewing, and mindfulness).

Jake Glanc

Provisional Psychologist
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Jake aims to work collaboratively and compassionately with his clients, believing that a strong and honest therapeutic relationship is the best predictor of success in therapy.

Luka Milicevic

Provisional Psychologist
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Luka is an engaging and passionate provisional psychologist committed to helping clients facilitate positive change and adopt new practices in their everyday lives. He offers a considered, thoughtful, and non-judgmental therapeutic approach that puts client needs at the center of his practice.


We want to hear from you. 


Meet Q is a new podcast series from Q Psychology. Meet Q is a unique conversation about LGBTQIAP+ mental health hosted by experts in the field: clinical psychologists Dr. Dave Demmer and Dr. Jamie Byrne, as well as GP Dr. Tom Dickson.

Get in touch

99 Wellington Street, St Kilda VIC 3182

​Ph. (03) 7023 4780
Fax. (03) 9492 5211


    Q Psychology respectfully acknowledges the Yaluk-ut Weelam Clan of the Boon Wurrung peoples.
    We pay our respects to their past, present, and emerging Elders, and uphold their continuing relationship to this land, the land on which Q Psychology operates.