Tonda Hughes, RN, PhD, FAAN is the Henrik H. Bendixin Professor of International Nursing, and Director of Global Health Research, in the School of Nursing at Columbia University; she has an interdisciplinary appointment as Professor in the Department of Psychiatry. Dr. Hughes holds the title of Professor Emerita at the University of Illinois at Chicago (UIC) where she was Collegiate Professor and Associate Dean for Global Health in the College of Nursing, and adjunct Professor in the School of Public Health. She holds/has held honorary or visiting professorships in England (Oxford Brookes University), Australia (University of Melbourne, Deakin University, University of Technology-Sydney) and the U.S. (University of Pennsylvania). Professor Hughes has a distinguished career in substance use research. She is well known for her ground breaking work focusing on sexual minority women’s health and she is an internationally recognized expert in the area of substance use and mental health among lesbian and bisexual women.