root9B Holdings, Inc. announced the addition of General Michael Hayden to root9B's Advisory Board. General Michael Hayden is a retired four-star general who served as director of the Central Intelligence Agency (2006-2009) and the National Security Agency (1999-2005). As head of the country's premier intelligence agencies, he was on the frontline of global change, the war on terrorism and the growing cyber challenge. In addition to leading the CIA and NSA, General Hayden was the country's first principal deputy director of national intelligence and the highest-ranking military intelligence officer in the country. General Hayden is currently a principal at The Chertoff Group and a distinguished visiting professor at the George Mason University Schar School of Policy and Government.