Matt Zullo is a retired U.S. Navy Master Chief Petty Officer who worked in the US Intelligence Community. He has more than 35 years' experience in Radio Intelligence, now more commonly known as Communications Intelligence. He holds a Master's degree in Strategic Intelligence from the National Intelligence University, where he researched and wrote his master's thesis on the On-The-Roof Gang. He has published numerous articles on the On-the-Roof Gang on internal work websites, in the Naval Cryptologic Veterans Association's Cryptolog magazine, and on his social media platforms. As a quantifiable expert on the On-the-Roof Gang, he has spoken at the 2009, 2011, and 2013 Cryptologic History Symposia, as well as at several Navy events around the world. He nominated Harry Kidder for the National Security Agency's Cryptologic Hall of Honor and was a guest at the induction ceremony. Learn more at www.ontheroofgang.com and www.mattzulloauthor.com.