Meet Our Team

Our Paediatric Dentists

Dr Susan Hsieh Specialist Paediatric dentist

BDS, DClinDent (Paed Dent), MRACDS (Paed Dent)

Australian Dental Association, Royal College of Dental Surgeons, American Academy of Pediatric Dentistry, Australasian Society for Tongue and Lip Ties

Learn more about Dr Susan

Dr Susan graduated with a Bachelor of Dentistry from the University of Sydney in 2002. She worked as a general dentist in a busy private practice in Canberra, before commencing speciality training in Paediatric Dentistry at the University of Sydney in 2007. She completed her Doctor of Clinical Dentistry (Paediatric Dentistry) in 2009 and commenced part-time specialist practice in 2010.

Between 2009 and 2012, Dr Susan was appointed as a Senior Registrar in Paediatric Dentistry at Westmead Centre for Oral Health, a Visiting Dental Officer at Hornsby Kuring-gai Hospital, and a clinical associate lecturer in the Faculty of Dentistry at the University of Sydney. She was also involved in research in tongue-ties and frenectomies (tongue-tie release) in infancy and was a guest speaker at the NSW Childhood Cancer Survivorship Info Day. Dr Susan was awarded first prize in the Australian New Zealand Society of Paediatric Dentistry Postgraduate Research Competition in 2010, and was a finalist in the American Academy of Pediatric Dentistry Graduate Student Research Award in 2011. Her research work was published in the journal Cancer in 2011.

Dr Susan and Dr Thuy collaborated in 2011 to establish St George Paediatric Dental Specialists.  Dr Susan prioritises integretive approaches to dental health, especially in prevention and management of dental caries in young children, optimising jaw growth and oral myofunction, and more recently, the use of LASER in paediatric dentistry. She has attended multiple continuing education courses and seminars, including:

  • Progressive Orthodontics Seminars
  • Myobrace Therapy and Arch Expansion with Dr John Flutter
  • Early Treatment of Malocclusions with Dr German Ramirez-Yanez and Myofocus
  • LASER applications with Professor Giovanni Olivi and Dr Hisham Abdallah
  • Tongue tie diagnosis and management with the Tongue Tie Institute, Breathe Institute with Dr Soroush Zaghi and ASTLiT
  • “Food is Medicine” Mindd International Forum

Dr Susan is proficient in Mandarin.  On her days off, she is kept busy trying to do what she preaches to her kids.

Dr Thuy Huong Nguyen Specialist Paediatric dentist

BDSc, DClinDent (Paed Dent), MRACDS (Paed Dent)

Australian Dental Association, Royal Australasian College of Dental Surgeons, American Academy of Pediatric Dentistry.

Learn more about Dr Thuy

sDr Thuy graduated from Melbourne University in 2003. She worked for a number of years in private practice and at Westmead Dental Hospital before starting her Paediatric Dental training in 2007 at the University of Sydney.

After completing her Doctorate of Clinical Dentistry at the University of Sydney in 2010 she worked as a Senior registrar at Westmead Centre for Oral Health and in private practice in Newcastle.

Dr Thuy and Dr Susan collaborated in 2011 to establish St George Paediatric Dental Specialists. While growing the practice, her family also grew and now she has two boys who keep her busy.

 She practises all aspects of Paediatric Dentistry with particular interest in working with special needs children and myofunctional Orthodontics


Dr Melissa Warren Specialist Paediatric dentist

BDS (Hons), DClinDent (Paed Dent),MRACDS (Paed Dent)

Australasian Academy of Paediatric Dentistry, Australian and New Zealand Society of Paediatric Dentistry, Royal College of Dental Surgeons, and American Academy of Pediatric Dentistry.

Learn more about Dr Melissa

Melissa is a registered specialist in Paediatric Dentistry, having obtained her Doctorate in Clinical Dentistry (Paediatric Dentistry) and Bachelor of Dental Surgery with Honours, from the University of Sydney.

During her training, Melissa received the prestigious Sydney Scholarship from the University of Sydney for the duration of her degree. She was also awarded the W Alan Grainger Memorial Prize and HJV Cusack Memorial Prize for clinical proficiency during her Bachelor of Dental Surgery, and the Dentsply Prize for Postgraduate Research­­­­­­­­­­­­­­­­­­­­­­­­­ during her Clinical Doctorate in Paediatric Dentistry.

Melissa is a Staff Specialist at the Children’s Hospital at Westmead, where she is involved in the multi-disciplinary management of children with complex medical needs. Her interests are in public health, dental trauma, dentistry for children with additional needs, and behaviour management for anxious children.

Melissa is an associate lecturer at both The University of Sydney and The University of New South Wales, where she is involved in the teaching of dental and medical students, and postgraduate doctors in the Sydney Child Health Program.

Melissa has always enjoyed volunteering her time both at home and abroad, with organisations such as the Angkor Hospital for Children in Cambodia, Special Olympics Australia and Lifeline. As a mother of three young children, Melissa understands the importance of being involved in and giving back to her local community.


Our Anaesthetists

Dr Kate Pennington Specialist Anaesthetist, Paediatric Anaesthetist

B. Med (Hons) FANZCA

Fellow of the Australian and New Zealand College of Anaesthetists.

AHPRA Medical Practitioner with Specialist Registration in Anaesthesia. Member of Australian Medical Association Member of the Society of Paediatric Anaesthetists New Zealand and Australia.

Learn more about Dr Kate

Dr Kate graduated from the University of Newcastle with a Bachelor of Medicine with Honours in 1997. She then worked as an intern and resident medical officer at Royal North Shore Hospital. She commenced specialist training in Anaesthesia at St Vincent’s Hospital in 2000, and worked as an anaesthetic registrar there until 2003. She completed her training with a fellowship year at The Children’s Hospital at Westmead in 2004 and gained specialist recognition as an Anaesthetist.

Dr Kate commenced working as a specialist anaesthetist in 2005 and since then has worked as a Staff Specialist at The Children’s Hospital at Westmead and as a Visiting Medical Officer at St Vincent’s Hospital. She also is currently appointed as a Visiting Medical Officer at Prince Of Wales Private Hospital, and City West Day Surgery. Dr Kate’s professional interests include Paediatric Anaesthesia and teaching Anaesthetic Registrars and Medical Students.

She is kept busy out of work hours chasing her three boys who don’t leave her with much time for pursuing her other interests of reading, cooking and travel.

Dr Tho Ma Specialist Anaesthetist and Medical Perfusionist

MB BS Sydney 1998, FANZCA 2006, PG Dip Echo 2007


Fellow of the Australian and New Zealand College of Anaesthetists

AHPRA Medical practitioner with General and Specialist registration


Learn more about Dr Tho

Dr Tho Ma commenced his anaesthetic training in 2000 and completed his training at Liverpool Hospital, Sydney in 2006. During his training he worked at Liverpool hospital, The Canberra Hospital, St Vincent’s Hospital (Sydney), The Prince of Wales, Nepean Hospital, Bankstown hospital and The Sydney Children’s Hospital (Randwick). After completing his specialist training in 2006, he undertook further studies in the field of ultrasonography and completed his Diploma in Perioperative and Critical Care Echocardiography in 2007.

His is currently a Senior Visiting Medical Officer at Liverpool Hospital and several other private hospitals. Dr Ma is actively involved in teaching theatre nurses, medical students and anaesthetic registrars. He is a tutor/demonstrator for the HARTscan course from the University of Melbourne.

His areas of interest are Cardiothoracic and Vascular anaesthesia, Perfusion, Airway management, anaesthesia for Head and Neck surgery, Paediatric anaesthesia, Obstetric anaesthesia, Pain management and the use of ultrasound in clinical anaesthetic practice.

He enjoys spending time with his family, watching movies and reading books.

Dr Lucy Kelly Specialist Anaesthetist, Paediatric Anaesthetist

MBBS BSc (Med) 2007

Fellow of the Australian and New Zealand College of Anaesthetists

AHPRA Medical practitioner with General and Specialist registration

Learn more about Dr Lucy

Dr. Lucy completed her anaesthetic training in 2015, just down the road at St. George Hospital in Kogarah. During this time she also had rotations to Sutherland Hospital, Wollongong hospital, St Vincent’s Hospital and The Royal Hospital for Women.

Lucy went on to complete a fellowship in anaesthesia at Royal Prince Alfred Hospital (2016) and a second fellowship at The Children’s Hospital at Westmead (2017).

Lucy commenced working as a specialist in anaesthesia at the beginning of 2018, at St George Hospital, The Children’s Hospital at Westmead and Kogarah Private Hospital. She enjoys a mixed practice of both paediatric and adult patients.

She has interests in remote anaesthesia and medical education.

Lucy likes to sing along to Disney classics. She likes to rock climb and make jam, whilst also finding time to spend with her family.

Our Allied Health Team

Ms Cathy Shortt Lactation Consultant, Registered midwife, Registered Nurse

B Nursing


Member of LCANZ, Australian Breastfeeding Association, ILCA

Learn more about Cathy

Cathy Shortt is a mother of three healthy, happy children. She has 20 years experience as a Registered Nurse, Midwife and Lactation Consultant (IBCLC) with a particular interest in lactation and parent craft education.
Having worked extensively overseas Cathy has a wealth of knowledge that she has brought to her professional practice in Australia. She works as a Midwife and Lactation Consultant in the private and public hospital setting and the home.

Cathy’s knowledge has been sought at Pregnancy and Baby Expos in Sydney for the last 5 years. She has presented at Expos three times a year in Sydney to give advice to expectant and seasoned mothers. Her expert advice covers the antenatal, postnatal period, newborn baby behaviours, breastfeeding, breastfeeding challenges, breastfeeding preparation, settling and sleep strategies. She has also featured in Positive Parenting magazine.

Cathy is a professional member of LCANZ, Australian Breastfeeding Association and ILCA. Cathy holds a Bachelor of Nursing, Graduate Diploma in Midwifery (APHRA), IBCLC and is currently enrolled in the Graduate Certificate in Child and Family Health.

Dr Vanessa FisherOsteopath





Learn more about Dr Vanessa

Dr Vanessa Fisher is a highly regarded osteopath who has worked in multi-disciplinary practices in both the UK and Australia for more than a decade.

Originally from the UK, Vanessa graduated from the world renowned British School of Osteopathy (BSO) in London in 2008 with a Bachelor in Osteopathy with Distinction. Vanessa was held in such high esteem at the BSO that she was asked to become a technique tutor in 2010; something Vanessa did until just before emigrating to Australia in 2014.

Vanessa founded The Willow Clinic in Sydney’s Northern Beaches later that same year and treats a wide variety of patients using a combination of osteopathic techniques and myofascial needling. With a dedicated approach to patient care and wellbeing, The Willow Clinic and Vanessa’s reputations are on the rise.

In the past five years Vanessa’s interests in women’s health and paediatrics have grown too; seeing her undertake many post graduate workshops and seminars, focusing on the latest research in tongue-tie, and on the assessment and management of the condition in babies. This has progressed to working with adults who also have tongue-ties, suffer with TMJ dysfunction, speech issues and sleep apnoea.

It is through this developing area of expertise that Vanessa first came into contact with Dr Susan Hsieh and the St George Paediatric Dental Specialists. Vanessa’s role at the clinic is to work alongside the dentists in the preparation for a tongue or lip tie procedure. This can include body work treatment – which is the use of physical therapy and hands-on treatment to release tension in soft tissues, and can be vital in the preparation for a release – as well as post-operative treatment and exercises – which aim to give the patient the best possible short, mid and long-term outcome.

When Vanessa is not being an osteopath she is an equally dedicated mum, and is most likely the one cheering the loudest in the front row of a swim meet, clarinet recital, nippers carnival, AFL or rugby match.