Gary Kessler

Principal Consultant, Fathom 5
President, Gary Kessler Associates

Gary Kessler, Ph.D., CISSP, is a principal consultant at Fathom5, president of Gary Kessler Associates, a retired professor of cybersecurity, and co-author of “Maritime Cybersecurity: A Guide for Leaders and Managers” (2021). His educational background is in mathematics and computer science, and he has been involved in the information security field since the late-1970s; his latest research efforts have been related to AIS cybersecurity vulnerabilities. Gary is a frequent speaker at industry conferences, and is the author or more then 75 papers, articles, and book chapters, as well as three books. Gary holds a national leadership position in U.S. Coast Guard Auxiliary cybersecurity efforts, is a Master SCUBA Diver Trainer, and holds a 50 GT merchant mariner credential. More information can be found at


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