Ph.D. and M.S. in Organizational Behavior, Haas School of Business at the University of California, Berkeley. B.A. in Psychology from Tufts University Sebastien Brion is an Associate Professor of Managing People in Organizations at IESE Business School. He holds a Ph.D. in Organizational Behavior from the Haas School of Business, University of California, Berkeley. In his research, Professor Brion explores the psychological effects of power, focusing on the attainment, maintenance, and loss of power in group and organizational settings. His dissertation explored how biases in the way that powerful individuals perceive their alliances with others contribute to the loss of power. In addition, he has explored the impact of overconfidence on leadership, investigating the critical distinction between leadership emergence and leadership effectiveness. Professor Brion’s research has been published in academic journals, including Organizational Behavior and Human Decision Processes, the Journal of Personality and Social Psychology, and the Annual Review of Organizational Psychology and Organizational Behavior. His research has also been highlighted in various publications, including The Economist, Le Monde, The Sunday Times, DieWelt, and Valor Economico. At IESE, Professor Brion teaches core classes on Leadership and Human Resources Management, and electives on Power and Influence, at the MBA and Executive level. Professor Brion has taught in executive programs for firms such as PepsiCo, L’Oréal, Puig, Danone, Santander, Nissan, NLNG (Lagos, Nigeria), and Kazakhstan Temir Zholy (National Railways of Kazakhstan), among others. In addition, he has held a Visiting Professor position at the Tuck School of Business at Dartmouth College and has taught in executive programs for the Haas School of Business Center for Executive Education, the Boston Consulting Group, and MDE (Abidjan, Côte d’Ivoire).
As part of his professional activities Professor Brion has conducted research and consulting projects in the human resources and social media industries.

Areas of interest:
The Psychology of Power
Effectiveness in Groups and Teams
Alliance and Coalition Formation
Interpersonal Perception
Languages: English, French, and Spanish