Prior to joining the University of Waterloo, she worked on energy and transportation network optimization at IBM Research Dublin and on inventory management problems at the Centre for Operational Research and Analysis, Department of National Defence Canada. She was also invited for extended research visits at the Universität zu Köln in Germany and the University of Avignon in France. Dr. Ghaddar received a Ph.D. degree in operations research from the University of Waterloo, Canada. Her research has been supported by prestigious national and international scholarships and in 2012 she was awarded an FP7 IIF European Union Grant.