Walker, Matt: - Matt Walker, CEH, is a cybersecurity consultant and has held several cybersecurity positions throughout his career. An IT security and education professional for more than 20 years, he has served as the director of the Network Training Center for Cisco Networking Academy on Ramstein AB, Germany, and as a network engineer for NASA's Secure Network Systems (NSS). He continues to train and write certification and college-level IT and IA security courses.