William R. Acorn

William R. Acorn, PE, DFE, FASHRAE, CFLC is a consulting mechanical engineer expert specializing in the built environment. With a career encompassing project management, forensic analysis, and code compliance, he brings a multifaceted perspective to litigation work. His work centers on investigating mechanical system failures, assessing code compliance, and evaluating whether design deviations contributed to operational issues.

Mr. Acorn has been retained in numerous expert witness and consulting engagements both domestically and internationally, involving complex project design, construction, and operational issues in industries such as semiconductor manufacturing and healthcare facilities. His BSME in Mechanical Engineering from the University of Arizona, along with certifications such as Professional Mechanical Engineer and Certified Forensic Litigation Consultant, reinforce his ability to deliver objective, defensible analyses. He is regularly engaged by both plaintiff and defense counsel to provide clear, independent determinations of causation in disputes involving mechanical systems and code compliance.