Forensic, General & Medical
Expert Witnesses

Security Assessment

Roger G. Johnston, Ph.D., CPP

5 Navajo Court
Oswego, Illinois 60543

Phone(630) 551-0740

Over 1000 security vulnerability assessments for numerous companies, government agencies, and NGOs. 200+ technical papers and book chapters, 90+ invited talks (including 6 Keynote Addresses), 10 U.S. patents, international lecturing. Extensive experience as an expert witness and in providing litigat


Areas of Expertise




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