His research interests are in network measurement and anti-abuse for improved stability and security of the Internet. Prior to coming to BYU, he was a Senior Research Scientist at Verisign Labs since 2014, where his research included DNS ecosystem tools, monitoring, measurement, and modeling. Before that he was a Principal Research and Development Cyber Security Staff member at Sandia National Laboratories, where he had been employed since 2004 and where he was responsible for network-related research and development, including DNSSEC and IPv6 deployment efforts. While at Sandia he developed DNSViz, the widely used tool for DNS analysis and visualization. He also served as an ICANN Research Fellow supporting the Security and Stability Advisory Committee (SSAC) in 2013.