Walid El Ansari is a distinguished medical doctor, surgeon, and academic whose work bridges clinical practice and public health research, with a strong focus on obesity, bariatric surgery, and metabolic disorders. He has been actively involved with prominent institutions in Qatar such as Hamad Medical Corporation, Qatar University, and Weill Cornell Medicine-Qatar, where he contributes to both patient care and academic advancement. His research portfolio is extensive, covering topics like long-term outcomes of weight-loss surgery, obesity-related complications, diabetes management, and population health trends. In addition to clinical studies, he has contributed to large-scale systematic reviews and meta-analyses involving vast patient datasets, reflecting a strong emphasis on evidence-based medicine. He has also explored areas such as men’s reproductive and sexual health, lifestyle behaviors, and health education, particularly in the Middle East and North Africa region. With numerous publications in international peer-reviewed journals and collaborations across countries, he is recognized for his multidisciplinary approach that integrates surgery, epidemiology, and health sciences, making a significant impact on both clinical practice and global health research.