Dr. Castillo is certified by the Royal College of Physicians and Surgeons of Canada in Otolaryngology-Head and Neck Surgery. He has been in private practice for 42 years. He is also Board Certified by the American Board of Otolaryngology. He has an unrestricted license to practice Otolaryngology in the province of Ontario by the College of Physicians and Surgeons of Ontario. He has senior active consultant staff privileges at the Scarborough Hospital General Site and has consultant staff privileges at The Scarborough Hospital Birchmount Campus and Rouge Valley Centenary Health Centre. Dr. Castillo is committed to the field of cosmetic surgery and has many years of experience. He has spoken at international conferences world wide. Dr. Castillo is devoted to furthering his knowledge and expertise.