Mike Chapple, Ph.D., Security+, CySA+, CISSP, is author of more than 50 books, including the best-selling CISSP (ISC)² Certified Information Systems Security Professional Official Study Guide (Sybex, 2021) and the CISSP (ISC)² Official Practice Tests (Sybex, 2021). 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 in the IT, Analytics, and Operations Department at the University of Notre Dame's Mendoza College of Business, where he teaches undergraduate and graduate courses on cybersecurity, data management, 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, and also holds an MS in computer science from the University of Idaho and an MBA from Auburn University. Mike holds certifications in Cybersecurity Analyst+ (CySA+), Security+, Certified Information Security Manager (CISM), Certified Cloud Security Professional (CCSP), and Certified Information Systems Security Professional (CISSP). He provides security certification resources on his website at CertMike.com.

David Seidl, CySA+, CISSP, PenTest+, is 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 as 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 he has written books on security certification and cyberwarfare, including co-authoring CISSP (ISC)² Official Practice Tests (Sybex, 2021) as well as the previous editions of both this book and the companion CompTIA CySA+ Practice Tests (Sybex, 2020, 2018).

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