Thomas’s last name “Zweifel” means “Doubt” in English, so he is “Doubting Thomas”—but without doubt, there would be no innovation… Thomas is the award-winning author of eight books including “Communicate or Die,” “Leadership in 100 Days” and “The Rabbi and the CEO” that have been featured on ABC, Bloomberg, CNN, Financial Times, and Fast Company. As well as writing, he partners with CEOs and C-level executives on their strategy and performance and has taught leadership as a guest professor at Columbia University and HSG for the past two decades. After serving as CEO of Swiss Consulting Group from 1997 through 2013 (and helping clients make over $9 billion in added revenue), he was lucky enough to make an exit and now works only with selected projects and clients.