John Z. Wlascinski, P.E., C.F.E.I., C.V.F.I.

FORENSIC ENGINEER, Director of Professional Development

Sugar Land, TX

John Z. Wlascinski, P.E., C.F.E.I., C.V.F.I.

FORENSIC ENGINEER, Director of Professional Development

Sugar Land, TX

GET TO KNOW John Z. Wlascinski, P.E., C.F.E.I., C.V.F.I.

John Z. Wlascinski, PE, CFEI, CVFI, is the Board Chairman, Director of Professional Development, and Forensic Engineer with Haag Engineering Co. Mr. Wlascinski has been an integral part of the engineering team in Houston since 1993. He specializes in mechanical failures of industrial and commercial machinery, fire suppression systems and components, piping systems and components, and oil field equipment. He also specializes in HVAC system evaluation, fire/explosion origin and cause determination, and vehicle accident reconstruction. Prior to joining Haag, Mr. Wlascinski owned and operated two successful businesses: an automotive and heavy equipment repair company, and an underground utilities service company. Mr. Wlascinski is a licensed P.E. in 29 states, plus Washington D.C. and Puerto Rico. Mr. Wlascinski is an NAFI Certified Fire and Explosion Investigator, an NAFI Certified Vehicle Fire Investigator, and previously a Certified Infrared Thermographer, Level I. He earned his Mechanical Engineering degree from The University of Texas at Austin.

Primary Areas of Consulting

  • Mechanical Failures
    Industrial/Commercial Machinery
    HVAC equipment
    Fire suppression systems and components
    Piping systems and components
    Oil field equipment
  • HVAC Design/Operation Evaluation
  • Origin and Cause of Fires/Explosions
  • Accident Reconstruction
  • Moisture Source Determination
  • Evaluation and Scope of Damage / Monitoring Repairs
    Industrial plants
    Residential and commercial buildings


NAFI Certified Fire and Explosion Investigator (C.F.E.I.)

NAFI Certified Vehicle Fire Investigator (C.V.F.I.)


  • American Society of Heating, Refrigerating, and Air Conditioning Engineers (ASHRAE)
  • American Society of Mechanical Engineers (ASME)
  • National Association of Fire Investigators (NAFI)
  • National Council of Examiners for Engineering and Surveying
    (Model Engineer Record Holder)
  • National Fire Protection Association (NFPA)
  • National Society of Professional Engineers (NSPE)
  • Phi Theta Kappa National Honor Society
  • Society of Automotive Engineers (SAE)
  • Texas Society of Professional Engineers (TSPE)


Bachelor of Science in Mechanical Engineering
The University of Texas at Austin, 1991

Licensed Professional Engineer in the States of:

Alabama, Arkansas, California, District of Columbia, Florida, Georgia, Illinois, Indiana, Iowa, Kansas, Kentucky, Louisiana, Michigan, Minnesota, Mississippi, Missouri, Nevada, New Mexico, North Carolina, North Dakota, Ohio, Oklahoma, Pennsylvania, Puerto Rico, South Carolina, Tennessee, Texas, Virginia, Washington, Wisconsin, and Wyoming

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