Roger W. Griffith, P.E. Expert Witness
Curriculum Vitae

Contact this Expert Witness

  • Company: Griffith Engineering & Consulting, Inc.
  • Phone: (865) 471-8142
  • Website:

Specialties & Experience of this Expert Witness

General Specialties:

Plumbing and HVAC

Keywords/Search Terms:

Plumbing, plumbing systems, plumbing codes, plumbing design, plumbing engineering, piping, hot water systems, scalding, Legionella, fuel gas systems, gas appliances, gas venting, carbon monoxide poisoning, HVAC, HVAC design, fire protection, sprinkler systems, construction defects, failure analysis


Bachelor of Science, Mechanical Engineering, Tennessee Technological University

Years in Practice:


Number of Times Deposed/Testified in Last 4 Yrs:


Additional Information

Roger W. Griffith, P.E. is a licensed, professional mechanical engineer in 18 states and has over 34 years of experience as a mechanical engineer. . He is the founder and principal of Griffith Engineering & Consulting. His experience includes plumbing, HVAC, and sprinkler system design, forensic analysis, and expert witness consulting. For the past 15 years, Mr. Griffith has provided expert witness services, including deposition and trial testimony. In addition to plumbing, HVAC and sprinkler systems, his areas of specialty include hot water system design, hot water scalding, legionella, and venting of gas appliances as it relates to carbon monoxide poisoning. Mr. Griffith is a Board Certified Diplomate Forensic Engineer (DFE) of the National Academy of Forensic Engineers (NAFE). Prior to founding Griffith Engineering in 1997, Mr. Griffith worked at the Tennessee Valley Authority (TVA), an electric utility, as a nuclear piping analyst, valve and heat exchanger specialist, maintenance engineer and later maintenance supervisor at a fossil plant, and quality manager. There his engineering roles included failure analysis of plant equipment. He also taught courses on the subject of problem solving and failure analysis for company employees. Mr. Griffith serves on numerous code committees including the ICC Plumbing, Mechanical, Fuel Gas Code Action Committee, NFPA 54 Fuel Gas Code Technical Committees, and ASSE Scald Awareness Task Group. Professional Affiliations: American Society of Heating, Refrigeration, and Air Conditioning Engineers (ASHRAE) American Society of Mechanical Engineers (ASME) American Society of Plumbing Engineers (ASPE) American Society of Sanitary Engineers (ASSE) American Society of Testing & Materials (ASTM) International Code Council (ICC) National Fire Protection Association (NFPA) National Society of Professional Engineers (NSPE) Education: Bachelor of Science, Mechanical Engineering, magna cum laude