Stephen is a Principal Engineer in the Office of the CTO at Fastly, where he works on Internet measurements and analysis of measurement data. He is active in related research venues and regularly serves on program or review committees, most recently PAM, TMA, ANRW and the annual IRTF Applied Networking Research Prize (ANRP).
Prior to Fastly, he worked in the R&D team at the RIPE NCC, where he focused on projects based on RIS, RIPE Atlas and other data sources. Before that, he worked on the widespread deployment and measurement of IPv6 at Yahoo. He received his PhD in Internet routing scalability from the University of Glasgow in 2012.