Dr. Sia is a licentiate both in Medicine and Dentistry, an International Board-Certified Specialist in Oral and Maxillofacial Surgery, International and Philippine Board-Certified in Maxillofacial Surgery, and one of the few qualified and revered Oral and Maxillofacial Surgeons in the country with his expertise, passion, and goal to improve quality of life by restoring and improving oral function, facial appearance, and promote disease-free in the face, jaw, mouth, and surrounding structures. His practice comprises the full scope of Maxillofacial Surgery from minor oral surgery to major jaw reconstructive procedures with distant site tissue harvest and transfer. Dr. Sia had been in specialist practice for more than 15 years only focused on and specific to Maxillofacial, Implantology, and Oral Surgery.

Dr. Sia received his Doctor of Dental Medicine (DMD) degree from Cebu Doctors’ University and completed both the Philippine Board of Dentistry Licensure Examination thereafter the United States National Board of Dental Examination (NBDE). He then went for his four-year full-time clinical education and residency training in Oral and Maxillofacial Surgery held at the Prince Philip Dental Hospital, Hong Kong, S.A.R., and Maxillofacial Surgery at Queen Mary Hospital, Hong Kong. S.A.R. and at the same time obtaining his Postgraduate Diploma in Oral Surgery (PDipDS) and Master’s Degree in the discipline of Oral and Maxillofacial Surgery (MDS) at the University of Hong Kong. He was a recipient of the Clinical Fellowship grant by Arbeitsgemeinschaft für Osteosynthesefragen (AO) Foundation Craniomaxillofacial Division at the Department of Oral and Maxillofacial Surgery in Peking University School and Hospital of Stomatology immediately after residency. Furthermore, completed his Doctor of Medicine (MD) degree from the University of the Visayas, The Philippine Board of Medicine Licensure Examination, and the International Board Certification for Specialists in Oral and Maxillofacial Surgery (FIBCSOMS). Dr. Sia then completed his Certificate in Surgical Leadership from Harvard Medical School and received after that his Specialty Diploma of Membership in Oral and Maxillofacial Surgery (MOMS RCSEd) from the Royal College of Surgeons of Edinburgh, UK.

Dr. Sia is a recognized Fellow of the prestigious honor societies of both the International College of Surgeons (ICS) and the International College of Dentists (ICD). A Fellow of the International Board for the Certification of Specialists in Oral and Maxillofacial Surgery (IBCSOMS), International Association of Oral and Maxillofacial Surgeons (IAOMS), International and Philippine Academy of Medical Specialists (IAMS & PAMS), Philippine Association of Oral and Maxillofacial Surgeons (PAOMFS), Philippine Academy for Head and Neck Surgery (PAHNSI), International Congress of Oral Implantologists (ICOI), International College of Continuing Dental Education (ICCDE), Pierre Fauchard Academy (PFA). A Diplomate in the World Academy of Ultrasonic Piezoelectric Bone Surgery (WAUPS). He was also appointed as the International Relations Officer for the Philippines of the Young Oral and Maxillofacial Surgeon Group of Hong Kong. Dr. Sia is a current Ambassador representing Asia for the International Association of Oral and Maxillofacial Surgeons (IAOMS) NextGen Committee and the International Ambassador for Southeast Asia representing The Royal College of Surgeons of Edinburgh (RCSEd).

He is an active member of the International College of Maxillofacial Surgery (ICMFS), International Cleft Lip and Palate Foundation, Academy of Osseointegration (AO), American Academy of Implant Dentistry (AAID), and both Philippine Medical and Dental Associations.