Andrew Chi is a Security Research Engineering Technical Leader at Cisco, where he works with product teams and incident response teams to detect threats in large network telemetry datasets. Prior to Cisco, he was a computer scientist at Raytheon BBN Technologies, where he contributed to IETF standards for routing security (RPKI and BGPSEC) and served as software lead for an open-source RPKI validator. Andrew holds a bachelor’s degree in mathematics from Harvard and a PhD in computer science from the University of North Carolina.