Subsequent to obtaining his PhD at the University of Amsterdam he worked for the world’s largest consulting firm Accenture, after which he returned to academia. He has worked as a visiting researcher at the University of California, Berkeley and the University of Massachusetts, Amherst and the University of British Columbia in Vancouver. His research concerns various aspects of uncertainty. Frenk’s research on attitudes and decision-making examines various forms of evaluative conflict such as attitudinal ambivalence, decision reversibility and regret. Other forms of uncertainty that he investigates are risk perception, lack of control and mortality salience. Frenk is Head of Studies at the Politics, Psychology, Law and Economics (PPLE) bachelor program of the University of Amsterdam and Strategic Research Program coordinator at the National Institute for Public Health and Safety.