Dr. Hamilos joined the Division of Rheumatology, Allergy and Immunology at MGH as an Associate Physician in October 2003. He has expertise in asthma, allergic rhinitis, sinusitis, nasal polyposis, vasculitis, eosinophilic disorders and immune deficiency. Clinically, he is best known for his expertise in chronic sinusitis, nasal polyposis and asthma. In 2000, he developed algorithms for the diagnosis and management of chronic sinusitis that were published in the Journal of Allergy and Clinical Immunology. He has conducted workshops on fiberoptic rhinoscopy and lectured on chronic sinusitis pathogenesis and medical management at the Annual Meeting of the American Academy of Allergy, Asthma & Immunology and/or the American College of Allergy, Asthma & Immunology each year from 1997 - 2016. He co-authored a monograph entitled: Chronic rhinosinusitis: Pathogenesis and Medical Management published by Informa Healthcare in 2007. He is a contributing author to the internet-based medical publication UpToDate on the subjects of chronic rhinosinusitis and allergic fungal rhinosinusitis.  He conducts clinical research on the pathogenesis of allergic asthma and new biologic treatments for nasal polyposis.