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Macquarie Street


Innovation. Community. Action.

About us

Macquarie Street Psychology is a private psychology clinic located in Prahran, Melbourne. Macquarie Street was founded by Dr. Dave Demmer and Dr. Beau Growcott based on their shared interest in men’s mental health. The team at Macquarie Street is passionate about addressing the psychological issues faced by men, as well as by members of the LGBTQIA+ community. 

Founded on the values of Innovation, Community, and Action, Macquarie Street Psychology is focused on supporting mental health at both individual and community levels. Our  therapists take an adaptive, authentic, and creative approach to therapy, and support clients to address various difficulties such as depression, anxiety, stress- and adjustment-related issues, trauma, gender identity, addiction issues, phobias, OCD, issues of low self-esteem/self-worth, relationship issues, and personality disorders, as well as many others.

Dr Dave Demmer and Dr. Beau Growcott also operate Wellington Street Psychology, located in St. Kilda. We have various therapists at both locations. Click here to visit the Wellington Street website.

Our team

Dr. David H. Demmer

Clinical psychologist, co-founder and Clinical Director of Macquarie Street Psychology

Dave’s therapeutic style is collaborative, authentic, and strategy-focused. As well as 1:1 talk therapy, Dave is trained in couples therapy and holds a diploma of clinical hypnosis. 

Dave is based at our Wellington Street clinic

Dr. Julia Nazarewicz


Julia is an LGBTIQA+ friendly practitioner and adopts a non-judgemental and person-centred approach to working with clients. She has undertaken training and has experience in cognitive behavioural therapy, acceptance and commitment therapy, motivational interviewing, reminiscence therapy, and social skills training. 

Dr. Beau Growcott

Psychologist and co-founder of Wellington Street Psychology

Beau is an LGBTQIA+ friendly practitioner with an empathic, pragmatic, and collaborative approach. He combines cognitive-behavioural techniques (CBT), with Acceptance and Commitment Practices (ACT), and Motivational work.  Beau also specialises in hypnosis.


Dr. Jamie Byrne

Clinical psychologist 

Jamie takes a humanistic and positive psychology approach to her practice, which gives clients practical skills to apply to their life. In developing a working relationship with clients, she values collaboration, authenticity, respect, and empathy. 

Mr. Rocco Mammoliti


Rocco is a therapist who sees the importance of focusing on the therapeutic relationship with each person; to collaborate with people in a safe, accepting, and empathic space, and build on or mobilise their strengths to reach their personal goals. 

Dr. Angie Montgomery

Health Psychologist

Angie is a registered Health Psychologist focused on creating a safe and compassionate space to work with her clients as they navigate challenges such as work-related stress or burnout, anxiety, trauma, life changes, grief and loss, or mood issues such as depression or anger. 

Mr. Marc Moskowitz

Accredited Mental Health Social Worker, Counsellor and Psychotherapist

Marc offers a welcoming, non-judgemental and supportive space working from a holistic and relational approach. Marc’s approach is informed by attachment theory, gestalt therapy, humanistic and person-centred counselling, systems theory, relational psychotherapy, mindfulness and self-compassion.

Kefu Xie


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

Kefu is based at our Wellington Street clinic

Ursula Silverstone

Practice Manager

Ursula has a background in administration and manages the day-to-day operations of MSP. Ursula is currently working towards her registration as a psychologist having completed an undergraduate degree and honours in psychology. She is currently completing her Masters of Clinical Psychology.

Dr. Bella Marker

Clinical psychologist & Senior Psychologist 

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

Bella is based at our Wellington Street clinic

Dr. Julia Hosie


Julia Hosie is a registered psychologist and member of the Australian Psychological Society. Julia is an LGBTQIA+ friendly practitioner and adopts a non-judgemental, pragmatic and holistic approach to working with clients.

Julia is based at our Wellington Street clinic

Click here to meet our Wellington Street team.



Want to be part of our team? We want to hear from you. 

Given the current community health concerns we ask all those who visit our clinic to follow these guidelines:

  1. If you have any symptoms consistent with COVID-19, or any flu-like symptoms, please do not attend your appointment in person. Please contact your treating psychologist as soon as possible and they will organise to meet via TeleHealth;

  2. Please ensure you wash and sanitize your hands when entering the premises – hand wash, hand sanitizer, and disposable paper towel are available in the common areas of the practice;

  3. We ask that any friends or family members who may support you to get to your appointment not enter the premises (unless you are under 18 years of age). If you do require a friend or family member to wait with you please let your treating psychologist know prior to the appointment;

  4. Please maintain a 1.5 metre distance from all others in the waiting room (the waiting room is currently configured to support this so please take a seat in the allocated chair positions);

  5. TeleHealth appointments are available and your treating psychologist will discuss this option with you directly.


Our practice receives regular professional cleaning and we will continue to prioritise your health and safety.

Covid-19 update


Get in touch

Contact us


3 & 5 Macquarie Street

Prahran, VIC, 3181

Ph. (03) 8374 7637

Fax. (03) 9923 6453

Email: talk@macquariestreetpsych.com

Macquarie Street Psychology Primary RGB

99 Wellington Street

St Kilda, VIC, 3182

Ph. (03) 8374 7637

Fax. (03) 9923 6453

Email: talk@wellingtonstreetpsych.com

Visit our website


© 2020 Macquarie Street Psychology

Macquarie Street Psychology Primary RGB