Jonathan Grier has been an independent security consultant and researcher for over a decade. He has conducted forensic investigations, performed security audits, trained programmers in secure application development, and advised clients on data security. He has forensically investigated employee dishonesty, network break-ins, data theft and industrial espionage. Jonathan has consulted for clients in health care, telecommunications, construction, and professional services, and taught classes sponsored by the US Department of Defense Cyber Crime Center.

An active researcher, Jonathan has developed new methods used in forensics and application security. Microsoft Press, the Journal of Digital Investigation, Digital Forensics Magazine, Symantec, Information Week and the US Department of Defense have all featured his work.