Catherine Sinclair is board certified in Otolaryngology Head and Neck Surgery in Australasia and the United States. She completed fellowships in Head and Neck surgery and Laryngology at the University of Alabama at Birmingham and the New York Center for Voice and Swallowing, respectively. She is an active member of many Endocrine National Committees including the Executive Committee of the Endocrine Section of the American Head and Neck Society and the Guidelines and Statements Committee and Diversity Committee of the American Thyroid Association. She has published numerous peer reviewed papers and consensus statements on thyroid disease, thyroid cancer and operative techniques during thyroid and parathyroid surgeries. Her team has pioneered a new continuous neuromonitoring technique for the vagus nerve which can monitor motor, sensory and brainstem vagus nerve pathways during thyroid and brainstem surgeries. In 2019, she performed the first radiofrequency thyroid nodule ablation in New York and pioneered one of the first thyroid radiofrequency ablation programs in the United States. Research interests include intraoperative neuromonitoring of laryngeal nerves and voice preservation during thyroid and parathyroid surgery, radiofrequency ablation of thyroid nodules, and neurophysiology of the human larynx.