Sébastien has more than two decades of leadership experience. As an author, he believes breakthroughs often happen when experts venture outside their field. That is why, in "The Psychology of Leadership," he went beyond finance and economics to study research in psychology.

Nuala Walsh is an award-winning business consultant, behavioural scientist, independent non-executive director and ex-CMO. As MindEquity CEO, she consults with Fortune 500 firms, human rights and sports associations on strategy, reputation, culture and behaviour change. Reaching millions through a popular TEDx talk about Overcoming Indecision and 100+ articles written for Forbes, Inc and Psychology Today, her insights feature in the Financial Times, BBC World Series, Harvard Business Review and Fox Business.