Our Doctors & Instructors

SAC employs the largest number of specialist doctors in Aviation Medicine outside of the RSAF, providing professional care and consultancy to individuals, commercial companies as well as several educational institutions. Several doctors are dual-qualified as specialists in Occupational Medicine as well. Our Family Medicine doctors are all highly experienced Designated Medical Examiners (for pilots) and Designated Workplace Doctors.

Our Doctors


COL(DR) (NS) Timothy Teoh


Medical Director

Dr Timothy Teoh is a specialist in both Aviation Medicine and Psychiatry. After graduating from NUS Medical School in 2000, he joined the Republic of Singapore Air Force as an Aviation Medical Officer. During his 20-year career in the SAF, he held various operational, staff and leadership appointments, including Head Psychological Care Centre, Commanding Officer 1 Medical Squadron, before attaining the rank of Colonel and the pinnacle appointment of Commander MMI from 2018 to 2021, overseeing primary and specialist healthcare for the SAF. He was previously appointed Senior Consultant in Aviation Medicine and Consultant in Psychiatry to the SAF. Dr Teoh joined Singapore Aeromedical Centre as Medical Director in Sep 2021.


COL(DR) (RET) Kenneth Fong


Medical Director (Education)

Dr Kenneth Fong is a specialist in Aviation Medicine. After graduating from National University of Singapore Medical School in 1984, he joined the Republic of Singapore Air Force as an Aviation Medical Officer. During his career in the Singapore Armed Forces, he was sent for Aviation Medicine training on the Diploma in Aviation Medicine Course in Farnborough, UK, the Master of Science Programme in Aerospace Medicine in Wright State University in Dayton, Ohio, USA and the US Air Force Advanced Aerospace Medicine course for International Medical Officers in the USAF School of Aerospace Medicine. Dr. Fong held various appointments in his career in the SAF, including the head of the RSAF Aeromedical Centre, the Senior Medical Officer (Health Care) of HQ Singapore Armed Forces Medical Corps and the Commander of the Singapore Armed Forces Military Medical Institute, before retiring from active duty in 2007. He then joined Singapore Aeromedical Centre / ST Healthcare as the Medical Director (Education). He has also been appointed as a Visiting Consultant to the SAF and is a Medical Assessor for the Civil Aviation Medical Board.


COL(DR) (RET) Richard Tan Hung Yong


Senior Consultant

After his graduation from University, Dr Richard Tan served with the Singapore Armed Forces for the next 19 years. In the Armed Forces, he held various command and staff appointments. These included Heads of Clinical Aviation Medicine Branch, Medical Operations, Doctrine and Training Branch in the Aeromedical Centre and Head General Staff Branch in HQ Medical Services. He was appointed Chief of Air Force Medical Officer of the Republic of Singapore Air Force in Feb 1999 and joined ST Medical Services, now known as ST Healthcare Pte Ltd, in Feb 2004.


LTC(DR) (RET) Ng Wee Tong


Visiting Consultant

Dr Ng Wee Tong is an Associate Professor with the Saw Swee Hock School of Public Health, National University of Singapore. He was with ST Healthcare from 2009 to 2019, and currently serves as a visiting consultant. He is a specialist in Aviation Medicine and Occupational Medicine with many years of experience providing service to public institutions as well as private companies. Dr Ng obtained his basic medical degree in the UK (University of Leicester), before signing on to train in Aviation Medicine (at King’s College London) with the RSAF. He served in the Republic of Singapore Air Force from 1997-2009, before joining Singapore Aeromedical Centre/ST Healthcare. He has a keen interest in industrial and aviation safety and health, human factors, workplace ergonomics and fatigue risk management systems.


DR Alvin Woo Jia Hao


Aviation Medical Officer

Dr Alvin Woo is a registered Family Physician. He obtained his MBBS from the National University of Singapore in 2012. After completing his National Service in the Republic of Singapore Air Force Medical Service, he went on to complete his Family Medicine Residency under the National University Health System, obtaining his Master of Medicine (Family Medicine) in 2018. Dr Woo has considerable primary care experience, having worked in both polyclinics and private general practice prior to joining ST Healthcare. Dr Woo graduated from the postgraduate Diploma in Aviation Medicine Course conducted by King’s College London in March 2020 and is currently a trainee in the National Aviation Medicine Sub-Specialty Training Programme, the first non-military trainee under this programme.


DR Chan Kay Heem


Senior Medical Officer

Dr Chan Kay Heem is a Family Physician and Medical Officer (Clinical Division). Dr Chan graduated with his medical degree from NUS in 1989 and a graduate diploma in Occupational Medicine from NUS in 1998. He is a Designated Workplace Doctor registered with the Ministry of Manpower and is qualified to conduct statutory medical examinations. Having obtained a Certificate in Aviation Medicine from the Singapore Aviation Academy in 2005, he serves as a Designated Medical Examiner with the Civil Aviation Academy, conducting medical examinations related to the issue and renewal of Singapore flight crew and air traffic control licenses. He is also a CASA medical examiner. Having previously worked for many years at the Singapore National Eye Centre, he has a particular interest in diseases of the eye. Dr Chan also has an interest in natural medicine, which he uses to complement his conventional medicine practice.


DR Abraham Mathews


Senior Medical Officer

Dr Abraham Mathews is a Family Physician and Senior Medical Officer (Clinical Division) at Singapore Aeromedical Centre/ST Healthcare. He graduated from NUS in 1987 and has a post graduate diploma in Occupational Medicine (2003) from NUS and a certificate in Aviation Medicine (2005) from the Singapore Aviation Academy. He has extensive experience as a Designated Workplace Doctor registered with the Ministry of Manpower and conducts statutory medical examinations under the workplace safety and health framework in Singapore. He is also a Designated Medical Examiner for the Civil Aviation Authority of Singapore, as well as for the Civil Aviation Safety Authority (CASA) (Australia) and Civil Aviation Authority, South Africa.


DR Shehnaz Anaswala


Senior Medical Officer

Dr Shehnaz Anaswala is a Family Physician and Medical Officer (Clinical Division) at Singapore Aeromedical Centre/ST Healthcare. She graduated from NUS in 1991. She holds post graduate diplomas in Occupational Medicine (2012) and Mental Health (2015), as well as a certificate in Aviation Medicine (2011) from the Singapore Aviation Academy. She also has a certificate in Hyperbaric and Underwater Medicine (2014) from the Postgraduate Medical Institute SGH. She is a Designated Workplace Doctor registered with the Ministry of Manpower and conducts statutory medical examinations under the workplace safety and health framework in Singapore. Dr Shehnaz is also a Designated Medical Examiner for the Civil Aviation Authority of Singapore and CASA (Australia). She conducts medical examinations for the issue and renewal of Singapore flight crew and air traffic control officer licenses.

Our Instructors


GP CAPT(DR) (Ret) Amit Sinha


Physiology Training Officer

Dr Amit is an Aerospace Physiology Instructor in ST Healthcare. Prior to joining the company, he has served the Indian Air Force as a specialist medical officer for 28 years and as an Aviation Medical Examiner for the Director General Civil Aviation, Govt of India. During his military service, he was a Squadron Medical Officer of frontline fighter squadrons and became a Senior Medical Officer of operational air bases of the IAF both during peace and operations. He has been an Instructor, HOD of Acceleration Physiology and Professor of Aviation Medicine at the Institute of Aerospace Medicine, Bangalore. He has also commanded the IAF Aeromedical Training Centre in the National Capital Region, India. Dr Amit has also served as an UN peacekeeper in the Democratic Republic of Congo where he was Senior Medical Officer of an Indian Aviation Contingent. His vast experience includes clinical medicine, military and civil aviation medicine, aeromedical research and aerospace medicine training of pilots, undergraduate and post-graduate doctors.


DR Wong Yuan Sy


Physiology Training Officer

Dr Wong Yuan Sy is a Physiology Training Officer and is a Certified Aerospace Physiologist (CAsP) with the Aerospace Medical Association. She graduated from UK (University of Leeds) in 1998, obtained her Master’s Degree in Aviation Physiology from King’s College London in 1999 and a PhD in Bioengineering from NUS in 2008. She was a scientist in Defence Medical & Environmental Research Institute at DSO National Laboratories for over a decade and conducted biomedical research for SAF and MINDEF in heat stress physiology, biosensors and biotechnology. She had also undertaken research management in MINDEF, covering research areas such as military physiology, biomechanics, trauma and vision performance.


MAJ(RET) Jimmy Ng


Special Senses Training and Development Officer

Jimmy is the Special Senses Training and Development Officer at Singapore Aeromedical Centre. He is a specialist pilot and chief instructor for Spatial Disorientation and Night Vision Goggles training. He is a Qualified Helicopter Instructor (QHI) with more than 4300 hours of flying. He served a total of 30 years in the RSAF, flying the UH-1 and Super Puma operationally. During his tour of duty with the RSAF, he held various appointments such as Squadron and Formation Safety Officer, Officer Commanding (OC), Squadron S3, Formation Dy S3 and Commanding Officer (CO). He led the SAF’s Super Puma detachment to Phuket which rendered humanitarian assistance during the Boxing Day Tsunami in year 2004. He also participated in many events and exercises both locally and overseas, such as the National Day and SAF Day Flypast. He counts the numerous Search and Rescue (SAR) and Medical Evacuation (Medivac) missions he flew amongst the highlights of his flying career – evacuating sailors suffering from various injuries while out at sea and soldiers suffering heat stroke during training at Pulau Tekong.


MAJ(RET) Robert Tan


Special Senses Training and Development Officer

Robert is a Special Senses Training and Development Officer responsible for Spatial Disorientation and Night Vision Goggles (NVG) training. He retired from the RSAF in 2015 with a total of 6463 military flying hours, of which 744 were flown with NVGs. He has been a Qualified Helicopter Instructor (QHI) from 1990 and taught ab-initio rotary wing pilots for 6 years. In his 34 years in the RSAF, he has served as an operational pilot and QHI in operational squadrons, and also as Deputy Operations Officer in the then Unmanned Aerial Vehicle (UAV) formation. His last 8 years in the RSAF were dedicated to commanding an overseas detachment focused on training and upgrading of operational pilots, especially in night jungle terrain operations as well as medical evacuation missions. He has flown numerous medical evacuation missions there, of which 50% were executed at night in marginal weather conditions.