Dr. Guzman is a voice pathologist with twenty-two years of clinical and academic experience. He received his Ph.D. in Vocology from the Tampere University, Finland.  He also holds a certification in vocology from the University of Iowa and National Center for Voice and Speech (USA). Dr. Guzman joined the faculty at the Universidad de los Andes, Department of Communication Sciences and Disorders in 2018 following a 15-year academic career at the University of Chile. He also works as a clinician in the Department of Otolaryngology, Las Condes Clinic, Chile. Moreover, He joined the Tampere University (Finland) as Adjunct Professor in 2018. Since 2022, Dr. Guzman is part of the faculty at the Summer Vocology Institute (University of Utah, USA). Additionally, Marco Guzman participates as guess lecturer at the Master of Clinical Vocology at the University of Bologna (Italy). Dr. Guzman is an active and worldwide recognized researcher and author of numerous scientific articles and book chapters related to the underling physiology of semi-occluded vocal tract exercises, physiologic voice therapy, and supraglottic constrictions during singing and speaking voice. Dr. Guzman is frequent speaker and lecturer at national and international meetings on topics related to assessment and management of voice disorders.  He belongs to the editorial board of the Journal of Voice and to the Pan American Vocology association (PAVA) Advisory Board.

Dr. Guzman´s main lines of research are: 1) Effect and efficacy of semioccluded vocal tract exercises for voice treatment and training. 2) Vocal tract narrowing in professional voice users. He has conducted numerous studies to explore aerodynamic, acoustic, morphometric, and perceptual changes during and after these exercises. He has also published several clinical randomized-controlled trials on the efficacy of different physiologic therapeutic protocols on people with voice problems. Dr. Guzman has also contributed to the science and physiology of vocal tract constrictions during singing and speaking voice.