manadr doctor

Executive Team

Dr Siaw Tung Yengborder shape

Dr Siaw Tung Yeng, PBM


  • More than 30 years of extensive experience in healthcare and medical informatics.
  • Ex-Chief Information Officer, Chairman of Medical Audit Subcommittee and Regional Medical Director of Healthway Medical Group (“HMG”). HMG has more than 100 clinics and medical centers, and is one of the largest in Singapore.
  • Served for 16 years as director for United Vision Holdings Pte Ltd, supervising multiple family medicine clinics, and serving as a Senior Consultant Family Physician.
  • Former clinical lecturer (Family Medicine) for Yong Loo Lin School of Medicine, National University of Singapore.
  • Member of Singapore Medical Council’s (“SMC”) Complaints Panel, SMC’s Disciplinary Committee, Advisor of Singapore Family Medicine Continuing Medical Education.
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Dr Rachel Teoh Pui Puiborder shape

Dr Rachel Teoh Pui Pui, PBM


  • Leads engagement with clinician and healthcare providers, vendor partnerships, new businesses, and special projects.
  • Trained and held accreditations and certifications in dermatology, family medicine, general surgery, aesthetic, emergency medicine.
  • Member of American Aesthetic Association, American Society for Laser Medicine and Surgery and American Academy of Aesthetic Medicine.
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Law Pei Beiborder shape

Law Pei Bei

Chief Business Officer

  • MBA graduate from University of Cardiff Metropolitan.
  • Ex-head of business development and operations of Sano Pain Care Group, a pain care specialist offering drugless therapies in Malaysia.
  • Co-founder of Moss Motion, a design studio focusing on crafting meaningful and distinct brand experiences.
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Peng Chee Yongborder shape

Peng Chee Yong

Chief Financial Officer

  • Chartered Accountant Singapore, CPA Australia.
  • Ex-CFO of IAG Holdings Limited, a listed company in Hong Kong specializing in manufacturing medical devices.
  • Ex-audit and investment manager at ISOTeam Ltd, a listed company in Singapore specializing in facilities maintenance and renewal.
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Felicia Chan Siew Siewborder shape

Felicia Chan Siew Siew

Chief Technology Officer

  • Co-technical lead and Senior Software Developer at Manulife Technology and Services Sdn Bhd.
  • Developed a fully automated global actuarial process which was fully implemented in Manulife’s North America and Asia businesses, and a winner of the Qorus Innovation in Insurance Awards in 2018.
  • Analyst Programmer at a leading healthcare IT system provider.
  • First-class honors in Computer Science/Information Technology from University Tun Abdul Razak.
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Dr Nathan Siawborder shape

Dr Nathan Siaw

Chief Medical Officer

  • Served as an ophthalmology medical practitioner at various hospitals including Tan Tock Seng Hospital and Singapore National Eye Centre.
  • Medical officer in charge of the Singapore army care facility during the COVID-19 pandemic.
  • Recognized with the Singapore Health Quality Service Award by the Singapore National Eye Center and Singapore Health Services group.
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Rex Chinborder shape

Rex Chin

Financial Controller

  • Association of Chartered Certified Accountants.
  • Project cost controller at a leading listed property developer in Malaysia.
  • Conducting audits for Ernst & Young on listed companies and multinational corporations.
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