Thomas J. Mowbray, PhD, holds gold-level certification from the SANS Institute in network penetration and ethical hacking. Dr. Mowbray, who has earned a doctorate in computer science, has co-authored five other professional books, including Wiley's bestseller Antipatterns: Refactoring Software, Architectures, and Projects in Crisis. After founding the Northrup Grumman Cyber Warfare Community of Practice, Dr. Mowbray joined the Certification and Accreditation Team (an elite cybersecurity test group) as their network administrator, security tools customizer, and hands-on penetration tester. At the time of writing, Dr. Mowbray is the Chief Enterprise Architect of The Ohio State University.