Andy Yen is the Founder and CEO of Proton, where he focuses on building core internet services that uphold privacy and protect freedom. Under his leadership, Proton has developed ProtonMail, recognized as the world's largest secure email service, and ProtonVPN, the world's largest free and open-source VPN.

Prior to his work at Proton, Yen was a particle physicist at CERN, engaged in fundamental science research. He holds a Doctor of Philosophy (Ph.D.