Tahilia J. Rebello is trained as a neuroscientist, and completed her doctorate in the field of Developmental Psychobiology and Pharmacology at Columbia University. She is Assistant Professor in the Department of Psychiatry and Program Manager of the World Health Organization (WHO) Collaborating Centre for Research and Training in Global Mental Health at Columbia University Irving Medical Center. She is on the Steering Committee for the consortium of Global Mental Health Programs at Columbia and serves as the Project Coordinator for WHO’s Global Clinical Practice Network (GCPN) – the largest practice-based research networks for mental health in the world, consisting of over 15,000 health professionals from 158 countries who have been actively participating in research studies aimed at developing the next version of WHO’s International Classification of Diseases (ICD-11). She manages the development and implementation of global field studies aimed at enhancing the clinical utility, global applicability, and reliability of the ICD-11 diagnostic guidelines for mental and behavioural disorders which will be used by clinicians around the world. She is also part of the global team of scientists and clinicians who are now developing a comprehensive training program for global clinicians that will facilitate the implementation of the new ICD-11.