When a16z General Partner David Ulevitch founded OpenDNS, little did he know the rollercoaster he had just boarded. From CEO to CTO back to CEO, from consumer to enterprise, from being acquired (by Cisco in 2015) to being the acquirer, David shares his journey and advice for founders–not least of which relates to how you manage your own psychology, and learn how to trust your leadership, in times of change.