Omar Santos, Cisco's Product Security Incident Response Team (PSIRT) Technical Leader, investigates the most complex security vulnerabilities in Cisco and third-party products and systems. He mentors and leads engineers throughout Cisco, drawing on 20+ years of IT and security experience. He has designed, implemented, and supported numerous secure networks for Fortune® 500 companies and the U.S. government, and was technical leader within Cisco's World Wide Security Practice and Technical Assistance Center (TAC). An active member of the security community, he leads several industry-wide initiatives and standard bodies. His many Cisco Press books include CCNP and CCIE Security Core SCOR 350-701 Official Cert Guide and CCNA Cyber Ops SECOPS 210-255 Official Cert Guide (with Joseph Muniz), Cisco ASA: All-in-one Next-Generation Firewall, IPS, and VPN Services. He has also created and presented several video courses in the LiveLessons Art of Hacking Series.