Matthew J. Sitzmann, P.E., is a Forensic Engineer and Regional Engineering Manager with Haag Engineering Co. Mr. Sitzmann joined Haag in 2000, and has inspected and assessed damage to thousands of roofing systems and building envelopes. His expertise also includes mechanical equipment evaluations, such as HVAC systems and equipment, plumbing systems and equipment, and industrial, commercial, and residential machinery.

Mr. Sitzmann graduated from Iowa State University with a Bachelors degree in Mechanical Engineering. He earned a Masters degree in Mechanical Engineering from The University of Texas at Arlington and is licensed as a professional engineer in 10 states. He is a member of the American Society of Mechanical Engineers, and the American Society of Heating, Refrigerating and Air-Conditioning Engineers. Mr. Sitzmann is a contributing author and presenter for numerous Haag courses and certifications, including courses on commercial roofing, residential roofing, and weather damage. Mr. Sitzmann is a published author whose papers include “Effect of Dents in Condenser Fins on Air Conditioner Performance,” (ASHRAE), “Hail Effects on Air-Conditioner Performance,” (Proceedings of IMECE2007), and others.