William S. Marcisz

William S. Marcisz, JD, CPP, CHPA is a security management and consulting expert specializing in negligent security and violent crime litigation. With a career spanning security administration, legal practice, and healthcare security, he brings a multifaceted perspective to his litigation work. His work centers on investigating security breaches, assessing compliance with industry standards, and evaluating whether security protocols were adequately implemented.

Mr. Marcisz has been retained in numerous expert witness and consulting engagements across the United States, involving cases in healthcare, hospitality, and corporate security sectors. His Juris Doctorate in Law, along with certifications as a Certified Protection Professional (CPP) and Certified Healthcare Protection Associate (CHPA), 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 security management and premises liability.