Billy is the Director of Vulnerability Research at Qualys. Billy studies emerging threats with a focus on embedded devices, Industrial Control Systems (ICS), and Critical Infrastructure (CI). Before Qualys, Billy was a Technical Lead at Google where he led the front-line response for externally reported security issues and incidents. Prior to Google, Billy was the Security Program Manager at Internet Explorer (Microsoft). During his time at Microsoft, Billy led the company's response for several high profile incidents, including the response for Operation Aurora. Before Microsoft, Billy worked as a penetration tester, an intrusion detection analyst, and served as an active duty Marine Corps Officer.