This CSIS podcast series, funded by FireEye, interviews cybersecurity experts from different sectors to explore the effectiveness of cyber red lines and the different roles the government and private sectors have in cybersecurity policy. John Nagengast is Director of Government Solutions at AT&T. Prior to joining AT&T he worked for the National Security Agency for almost 38 years. At NSA he held several senior positions including Principal Director of Corporate Strategy and Assistant Deputy Director for Information Security. In 1987 he was appointed as a member of the Senior Executive Service.