Christian earned his Ph.D. in Psychology with a focus on Affective Sciences from the University of Geneva in 2015 for investigating the impact of social information on emotion recognition under the supervision of Prof. David Sander, director of the Swiss Center for Affective Sciences. In 2016, he joined the Consumer Decision and Sustainable Behavior Lab as a post-doctoral research fellow working with Prof. Tobias Brosch to investigate psychological mechanisms underlying sustainable behaviors using digital behavioral data. In 2018, he started teaching graduate students climate change communication and methodology of behavioral interventions as a Lecturer in the Department of Psychology of the University of Geneva. In 2021, he joined the Geneva School of Business Administration at the University of Applied Sciences and Arts Western Switzerland as an Assistant Professor in the Department of Information Sciences.

Grégoire studied economics and finance at HEC Lausanne where he was research assistant for many years. He also holds a certificate of open studies in applied data science from EPFL. He is particularly interested in how to use applied statistical models in the fields of economics, sports, new technologies and video games.