Mike Chapple, PhD, CISSP, is an author of the best-selling CySA+ Study Guide and CISSP (ISC)² Certified Information Systems Security Professional Official Study Guide, now in its eighth edition. He is an information security professional with two decades of experience in higher education, the private sector, and government.

Mike currently serves as teaching professor of IT, analytics, and operations at the University of Notre Dame, where he teaches courses focused on cybersecurity and business analytics.

Before returning to Notre Dame, Mike served as executive vice president and chief information officer of the Brand Institute, a Miami-based marketing consultancy. Mike also spent four years in the information security research group at the National Security Agency and served as an active duty intelligence officer in the U.S. Air Force.

Mike earned both his BS and PhD degrees from Notre Dame in computer science and engineering. He also holds an MS in computer science from the University of Idaho and an MBA from Auburn University.

David Seidl is the Vice President for Information Technology and CIO at Miami University. During his IT career, he has served in a variety of technical and information security roles, including serving at the Senior Director for Campus Technology Services at the University of Notre Dame, where he co-led Notre Dame's move to the cloud and oversaw cloud operations, ERP, databases, identity management, and a broad range of other technologies and service. He also served as Notre Dame's Director of Information Security and led Notre Dame's information security program. He has taught information security and networking undergraduate courses as an instructor for Notre Dame's Mendoza College of Business and has written books on security certification and cyberwarfare, including co-authoring CISSP (ISC)² Official Practice Tests (Sybex 2018) as well as the previous editions of both this book and the companion CompTIA CySA+ Practice Tests: Exam CS0-001.

David holds a bachelor's degree in communication technology and a master's degree in information security from Eastern Michigan University, as well as CISSP, CySA+, Pentest+, GPEN, and GCIH certifications.