Dr Ronald Guevara is an Australian trained Endocrine Surgeon.  He specialises in Thyroid, Parathyroid and Adrenal Surgery.  Operating in both public and private sectors, he maintains a public appointment as a Visiting Medical Officer at Liverpool Hospital.  He regularly  attends and presents his patients at the Endocrine MDT. In addition, he is the chair of the Liverpool Adrenal MDT.  Dr. Guevara participates in the acute surgical and trauma care roster at Liverpool Hospital.

He completed his General Surgery training at Liverpool Hospital, St George Hospital, Prince of Wales Hospital, Campbelltown Hospital, as well as multiple regional centres. After becoming a Fellow of the Royal Australasian College of Surgeons (FRACS) in 2019, he undertook two years of intensive fellowship training in Breast, Endocrine and Head & Neck surgery at St George Hospital. He has been published in the ANZ Journal of Surgery and has had multiple presentations in the Royal Australasian College of Surgeons (RACS) Annual Scientific Conference.