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R. Thomas Long, Jr., P.E., CFEI

Principal Engineer & Office Director

Thermal Sciences

Professional Profile


Mr. Long applies fire protection engineering principles including: material fire performance; ignition of liquid and solid fuels; flamespread; and fire modeling to the origin and cause investigation, engineering analysis, and prevention of fires, explosions, and other thermal events. Mr. Long has investigated numerous losses ranging from small residential fires to large explosions and fires in commercial, residential, manufacturing, storage, power generation, petroleum, and chemical facilities. He has also investigated losses involving welding and hot work operations, mechanical and HVAC equipment, manufacturing processes, firefighter PPE, textile garments, consumer products, appliances, utilities, candles, residential and commercial cooking equipment, mattresses, upholstered furniture, automotive, rail, and marine vehicles, and propane and natural gas appliances and systems. Mr. Long has testified as an expert witness in various occasions.

Mr. Long provides consultation on fire detection and suppression system operation, design, installation, evaluation, inadvertent operation, and failure analysis, in residential, commercial, and industrial applications. He has experience in the evaluation of facilities and systems for compliance with nationally and internationally accepted building and fire safety codes, standards, and regulations, including those published by the National Fire Protection Association (NFPA), the Building Officials and Code Administrators, International (BOCAi), and the International Code Council (ICC). Mr. Long also has special expertise in the design, installation, operation, evaluation, and third-party review of flame effect combustion systems.

Mr. Long has extensive experience with the numerous small, intermediate, and large-scale fire and flammability testing protocols, including those published by the ASTM, NFPA, CBHFTI, FM, UFAC, and UL. Prior to joining Exponent, Mr. Long conducted fire and flammability research at the University of Maryland at College Park, Department of Fire Protection Engineering.

  • M.S., Fire Protection Engineering, University of Maryland, 1998
  • B.S., Fire Protection Engineering, University of Maryland, 1996
  • B.S., Physical Science, Salisbury University, 1997
  • Principal Member: Technical Committee on Hot Work Operations, NFPA 51B: Standard for Fire Prevention During Welding, Cutting, and Other Hot Work, National Fire Protection Association
  • Principal Member: Technical Committee on Fundamentals of Combustion System Hazards, NFPA 85: Boiler Combustion System Hazards Code, National Fire Protection Association
  • Principal Member: NFPA 1620: Recommended Practice for Pre-Incident Planning, National Fire Protection Association
  • Member: International Standards Council (ISC), International Code Council (ICC), 2009–present

    • Registered Professional Engineer, California, #FP1707
    • Registered Professional Engineer, Colorado, #PE-42866
    • Registered Professional Engineer, Delaware, #16006
    • Registered Professional Engineer, Maryland, #31236
    • Registered Professional Engineer, New Hampshire #12760
    • Registered Professional Engineer, New York, #086751
    • Registered Professional Engineer, Illinois #062.061500
    • Registered Professional Engineer, Pennsylvania, #076022
    • Registered Professional Engineer, Virginia, #045406
    • Registered Professional Engineer, Washington D.C., #904965
    • Registered Professional Engineer, Wisconsin, #39698
    • NCEES Council Record file No. 36240.
    • Confined Space Entry Training, in accordance with OSHA 29 CFR 1910.146
    • Asbestos Awareness Training, in accordance with OSHA 29 CFR 1926.1101
    • Certified Fire and Explosion Investigator (CFEI) in accordance with the National Association of Fire Investigators (NAFI) National Certification Board per NFPA 921 (2004); Recertified, 2008 NAFI Advanced Fire, Arson, and Explosion Investigation Training Program (21 hours tested)
    • Hazardous Waste Operations and Emergency Response Training, in accordance with OSHA 29 CFR 1910.120