At Weight Management Psychology we believe psychology is the missing piece of your weight management puzzle.

We help you transform your mindset around eating, physical activity, weight and body-image with a combination of traditional and innovative evidence-based approaches.  We have fully registered psychologists who specialise in all areas of weight management using a range of approaches, including Cognitive-Behavioural Therapy (CBT),  Acceptance and Commitment Therapy (ACT), Hypnotherapy, and Emotional Freedom Technique (EFT), all within a Health At Every Size (HAES)-informed framework.

Meet the Team!

Glenn Mackintosh

Glenn Mackintosh_Profile

Glenn Mackintosh is the Founder of Weight Management Psychology and resident psychologist on Ten’s The Biggest Loser: Transformed. He is a member of the Australian Psychological Society, a fellow of the Obesity Prevention and Treatment Society, and the Queensland representative for the APS Psychology of Eating, Weight, and Body-image Interest Group. Before venturing into full time private practise, he was the Director of Psychology at the Wesley Lifeshape Clinic, and he also consults with Qld Bariatrics patients pre- and post- surgery.

Glenn’s research investigated psychological and social factors and weight management, and he has lectured in weight management psychology, health psychology, and sport and exercise psychology at the University of Queensland, Griffith University, and the Australian College of Applied Psychology.

Glenn has also developed the self-help resources The Complete Reprogramming Series, co-created Weight Management Psychology – Emotional Freedom Techniques for Weight Management Online Program with Professor Peta Stapleton, and developed The Twelve Month Transformation, a group and online program helping people free themselves from yo-yo dieting and develop naturally healthy habits.

Glenn also features in the media regularly, having interviewed on weight related topics for Weight Watcher’s, Grazia, and Good Health Magazines, 4BC, 4BH, Casey Radio, and A Current Affair.

Glenn’s passion is in helping people manage their eating, physical activity, weight, and body-image and training other professionals in applying psychological principals to help their clients who are grappling with weight management issues through his sold-out professional workshops, online courses for Personal Trainers through the Australian Fitness Network, and online courses for dietitians in conjunction with Dietitian Connection.

Glenn no longer sees new clients, but closely supervises the work of our expert weight management psychologists, Jayson and Shauna.

Dr Jayson Tatnell


Dr Jayson Tatnell is a weight management and general psychologist at Weight Management Psychology. He is a member of the Australian Psychological Society and has over 10 years’ experience in the field of health psychology.  Jayson completed a Bachelor of Science with Honours in Psychology in 2004 and a Doctorate in Health Psychology in 2008.  Jayson worked for Queensland Health in cancer care, palliative care, persistent pain, and community mental health giving him an amazing ability to work with people who are going through difficult times. Since 2014, he has been in private practice specialising in the psychology of eating, movement, weight, and body-image on the Sunshine Coast.

Many people seek out Jayson’s expertise in order to help them adjust to, and manage, challenging circumstances regarding their health.  Jayson is especially passionate about helping people make positive health behaviour changes to improve their physical and mental well-being and, in particular, achieving lasting success with weight management. He also enjoys offering pre- and post-surgery support to bariatric surgery patients from Qld Bariatrics.  Jayson, like Glenn, is experienced in both hypnotherapy and Emotional Freedom Techniques (tapping), two innovative approaches which are shown to improve both short- and long-term weight management results, and many of his clients find the addition of these therapies to be game-changing in creating positive and lasting changes.

Jayson’s Treatment Modalities include:

  • Cognitive Behavioural Therapy (CBT)
  • Acceptance and Commitment Therapy (ACT)
  • Hypnotherapy
  • Emotional Freedom Techniques (EFT)
  • Motivational Interviewing (MI)

Shauna Spencer


Shauna Spencer is a psychologist specialising in weight management. She completed her Bachelor of Science with Honours in Psychology at the University of Queensland in 2007. She also holds a Diploma in Fitness and is currently studying a Bachelor of Nutrition and Dietetics. She is incredibly passionate about helping people live happier, healthier lives.

Since graduating in 2007 Shauna has specialised in the psychology of weight management and has had a wealth of experience prior to joining the team at Weight Management Psychology. Shauna has assisted people pre and post bariatric surgery at the Royal Brisbane and Women’s hospital. She has worked as a weight management psychologist with Glenn at the Wesley Weight Management Clinic, where she was part of a multi-disciplinary team. She ran one-on-one appointments aimed at helping individuals to overcome psychological barriers that prevented them from losing and maintaining weight loss. She has also worked as a weight management psychologist at Adro Sarnelli’s (winner of season 1 Biggest Loser) The New Me Obesity Rehabilitation Centre in Melbourne where she ran group workshops and individualised consultations assisting people to develop healthy mindsets around food, eating and physical activity. She has owned and operated her own health coaching practice where she assisted a variety of people to make health related behavioural changes and improve their overall well-being. Further to this she has also worked with families on a research project called NOURISH with QUT that aimed to prevent childhood obesity by setting up healthy eating habits in young children.

Shauna’s Treatment Modalities include:

  • Cognitive Behavioural Therapy (CBT)
  • Motivational Interviewing (MI)
  • Acceptance and Commitment Therapy (ACT)
  • Mindfulness


Our psychologists offer a range of services, including:

  • One-on-one consulting
  • Couples, families, & group sessions
  • Workshops and seminars
  • Skype consultations

To book in with one of our psychologists, or if you have any further questions, please contact us.