Dr Jang Lee


Dr Jang Lee graduated from University of Sydney in 1994. He underwent advanced training at Westmead Public hospital in anaesthetic and intensive care and worked as a senior registra up until 2000. He currently works at Westmead and Strathfield private hospitals as a senior intensive care CMO. He is a clinical associate of the University of Sydney and is active in training final year medical students in ICU medicine.

Dr Lee is the Deputy Director of NSW Bone Bank since 2013. He has an interest in cosmetic injectables and has treated patients for the last 7 years.

Since 2012 Dr. Lee joined the team at SIOS as a bariatric physician, monitoring and working closely with patients to achieve optimal outcomes.

Dr Alum Sheila Uyirwoth


Dr Sheila is a specialist general practitioner who has a specific interest in weight loss surgery and weight loss management, Dr Sheila assists in most surgical procedures performed for our Sios patients so she has a good understanding for each particular patient’s need

Her aim at the SIOS clinic is to help patients achieve their healthy weight and wellbeing, in the aftercare program and beyond.

At SIOS we are delighted to have Dr Sheila as part of our specialised medical team as she brings wealth of experience and knowledge and very caring personalised service to our patients

Dr Sheila studied aeronautical engineering at The University of Sydney, followed by medicine and surgery at the University of Wollongong, graduating in 2014. She has trained across the Western Sydney and Western NSW Local Health Districts.

Other specific interest areas include aviation and occupational medicine, dermatology and women’s health. She is a Designated Aviation Medical Examiner, authorised by the Civil Aviation Safety Authority (CASA).

Consultations available at SIOS Clinic

Weight Management

Aftercare appointments for gastric band, sleeve and bypass

Dr Uyirwoth has a General Practice session once a week at SIOS for the following:

Aviation Medical Examinations

Women’s Health

Skin Checks/Dermatology


Fellow of the Royal Australian College of General Practitioners

Bachelor of Engineering (Aeronautical)

Bachelor of Medicine, Bachelor of Surgery

Diploma in Child Health

Australian Certificate in Civil Aviation Medicine

Certificate of Practical Dermoscopy

Certificate in Minor Surgery


Royal Australian College of General Practitioners

RACGP Specific Interest Group – Obesity

RACGP Specific Interest Group – Dermatology

Australasian Society of Aerospace Medicine

Dr Vincent Braniff

M.B., B.S. (Adel), B.A. (Syd), Capt RAAMC

Dr Vincent Braniff moved to Sydney after finishing his high school certificate and graduated from medicine at the University of Adelaide in 1993.

After internship at the Royal Adelaide Hospital he returned to Sydney and did residency at St Vincent’s Hospital in Sydney. He maintained part time work in the accident and emergency unit, whilst undertaking full time army service as a Regimental Medical Officer for the next 4 years and subsequent reserve service. After this he undertook periods of surgical training and work as a registrar at St Vincent’s & Liverpool Hospitals. This was interspersed with work internationally in Azerbaijan, Georgia, Mali, Nigeria, China, and Borneo.

Subsequently Dr Braniff worked as a locum surgical registrar at Tweed Heads Hospital and, for the last decade permanent part-time, in Emergency at the Allamanda Private Hospital on the Gold Coast.

n addition he is the resident Honorary Medical Officer & tutor at St Paul’s College, Sydney University, and is undertaking a part time Master of Arts by Research in international relations, having completed a Bacheolar of Arts (European Studies).

Dr Braniff first worked at SIOS in 2006 and has continued to work with bariatric surgeons in Australia and internationally since.

Dr Braniff provides an excellent clinical services and support to our patients, as part of the specialised and experienced multidisciplinary SIOS Aftercare team.

Dr Kevin Chan


Consultant Respiratory and Sleep Medicine Physician.

Dr Kevin Chan is a Consultant Respiratory and Sleep Medicine Physician with an extensive experience in attended (in-lab) and ambulatory (home) sleep studies as well as respiratory function tests. He treats a lot of patients with significant sleep disorders such as obstructive sleep apnoea and respiratory conditions that are commonly associated with obesity. He has been working in association with SIOS since 2014.

Dr Chan graduated from the University of Sydney Medical School in 1997. He completed his Basic Physician Training in Westmead Hospital before pursuing Advanced Training in Respiratory and Sleep Medicine in Westmead, Bankstown and Concord Repatriation Hospitals.

He was appointed as a Medical Review Officer by the NSW Ombudsman during the senior years of his Advanced Training.

Dr Chan has a very strong research interest and publication profile in the interaction between obstructive sleep apnoea and chronic cough. He is also heavily involved in the research of novel diagnostic sleep techniques that could be more convenient and comfortable for the patients. He has also presented in conferences on the interaction between type 2 diabetes and obstructive sleep apnoea, as well as cognitive impairment in obstructive sleep apnoea. He is the recipient of the        Conjoint Early Career Research Grant offered by the Western Sydney University in 2007.

Currently he holds an appointment as a Senior Staff Specialist in Camden and Campbelltown Hospitals. He is also a Visiting Medical Officer in Respiratory Medicine in Sydney Adventist Hospital, Wahroonga.

He is involved in a lot of teaching activities – and he hold lecturer positions in the Medical Schools of the University of Sydney and Western Sydney University.

Dr Chan brings a wealth of experience to SIOS in the management of many sleep disorders such as obstructive sleep apnoea, and respiratory disorders, that are frequently associated with obesity but commonly underdiagnosed. In particular, he offers thorough pre-operative assessments prior to bariatric surgery and surgeries requiring anaesthetics.

Dr Chan is currently consulting in SIOS on Tuesdays. His office can be reached via SIOS or via 1800961886 (Fax 0289151545).

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