Bob Callaway is the technical lead and manager of the supply chain integrity group in Google’s Open Source Security Team. He and his team directly contribute to critical secure supply chain projects and drive communication & adoption of best practices throughout the open source ecosystem. Bob serves as chair of the Open Source Security Foundation’s Technical Advisory Council, as well as founding member of the Technical Steering Committee for sigstore, a Linux Foundation / OpenSSF set of projects focused on improving transparency and UX of software supply chains. Before joining Google in 2021, Bob was a member of Red Hat’s Office of the CTO where he was responsible for emerging technology strategy with strategic partners (including IBM) and a principal architect at NetApp where he focused on contributions to OpenStack and storage automation projects. He holds a PhD in Computer Engineering from NC State University.