Michael Coates, CEO and co-founder of cloud security startup Altitude Networks, has had a long and varied career. Beginning with a stint as a consultant breaking into banks and continuing through roles as head of security assurance at Mozilla and CISO at Twitter, he has helped protect hundreds of millions of users over the years. He spoke with Dennis Fisher about what he's learned about empowering teams, the importance of making users safe by default, and the value of solving problems one at a time.