Clinical Governance & Professional Development

Behind every mission is a team that sets, enforces and teaches the standard. Our clinical leaders have run emergency departments, accredited hospitals and written the books on aeromedical care.

Dr Winston Jong

Founder, Group CEO and Group Medical Director

A practising intensivist and anaesthetist, Dr Jong chairs international forums where medical directors and flight physicians shape best practice in medevac and repatriation. He sets EMA Global's medical protocols, bringing the latest ICU and aeromedical practice into how our teams are trained, audited and deployed.

Dr. Mark Paul Castillo, Head of Clinical Governance & Quality

Dr Mark Paul Castillo

Head of Clinical Governance and Quality

A Fellow of the Philippine College of Emergency Medicine, Dr Castillo led Joint Commission International (JCI) accreditation at Makati Medical Center. He brings that same accreditation discipline to EMA Global, auditing our clinical practice and keeping every team to one measurable standard. For insurers, that means care that can be checked, not just promised.

Jaslyn Siow

Group Chief of Medical Operations

A registered nurse with over 34 years in acute care and a Bachelor of Health Science from the University of Sydney, Jaslyn manages all of EMA Global's medical operations and medical escorts. She leads our most complex, high-acuity repatriations, matching each patient with the right clinicians, equipment and plan. The sickest patients travel under the watch of one of the region's most experienced critical care nurses.

Dr. Johnny Sinon, President, Medical Director, Philippines

Dr Johnny Sinon

President and Medical Director, EMA Global Philippines

As President of the Philippine College of Emergency Medicine and former Medical Director of Makati Medical Center, Dr Sinon brings over 30 years in emergency medicine. He leads EMA Global Philippines' clinical and assistance operations, setting the medical direction for every case in the country. Patients in the Philippines are cared for under one of the country's most respected emergency physicians.

Nathanond (Nop) Bavornthanapipat, Head of Learning, Development & Training

Nathanond (Nop) Bavornthanapipat

Head of Learning, Development and Training

Nop brings over 20 years across medical assistance and international hospitals, so he knows what good care looks like on both sides of the call. He builds the training and simulation programmes behind every EMA Global team, covering complex case handling, customer service and how to support callers with empathy at their most stressful moments. Whichever of our six assistance centres takes your call, you're met with calm, capable people who listen first and act fast.

Rumi Yamamoto, Clinical Liason, Japan

Rumi Yamamoto

Clinical Liaison, Japan

A pioneer in aeromedical nursing, Rumi was among the first Japanese professionals to serve as a primary flight escort for major multinational assistance organisations. She has written two books on aeromedical medicine. As our Clinical Liaison and Medical Case Manager, she works directly with Japanese hospitals and doctors so every patient's care is coordinated without delay or confusion.

Tina Zainal, Training & Development Specialist

Tina Zainal

Training and Development Specialist

Tina comes from an employee benefits background in insurance, so she understands what insurers and corporate clients expect from an assistance partner. She works alongside our operations, medical, claims and quality teams to spot skill gaps early, and runs hands-on learning programmes built around real cases. Lessons from one mission improve the next, so clients get teams that keep getting better.

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