Mark Harless

Mark Harless, MS, PSP is a security consultant expert specializing in security negligence and premises liability litigation. With a career that spans federal law enforcement and corporate cybersecurity, he brings a unique blend of investigative and strategic insight to his litigation work. His work centers on conducting security assessments, developing risk mitigation strategies, and evaluating compliance with industry standards.

Mr. Harless has been retained in numerous expert witness and consulting engagements across the United States, involving cases related to security negligence, premises liability, and complex fraud analysis. His Master of Science in Criminology from Florida State University, along with his Physical Security Professional (PSP) certification, reinforce his ability to deliver objective, defensible analyses. He is regularly engaged by both plaintiff and defense counsel to provide clear, independent determinations of responsibility in disputes involving physical security and threat intelligence.