Benjamin T. Irwin, P.E., DFE, CXLT


Philadelphia, PA

Benjamin T. Irwin, P.E., DFE, CXLT


Philadelphia, PA

GET TO KNOW Benjamin T. Irwin, P.E., DFE, CXLT

With dual degrees in architecture and civil engineering from Lehigh University, and over 26 years of diverse professional experience, Mr. Irwin provides a wide array of engineering, design, construction, and safety consulting and expert witness litigation support services. He is a registered Professional Engineer in 24 USA jurisdictions (P.E.), and one Canadian jurisdiction (P.Eng.) and is recognized as a Model Law Engineer (MLE) by the National Council of Examiners for Engineering and Surveying (NCEES). He is a Board-certified Senior Member of the National Academy of Forensic Engineers (NAFE), holding the designation of Diplomate Forensic Engineer (DFE). He has been qualified for, and testified within, state and Federal courts, with retentions from both plaintiffs and defendants, often offering visualization demonstratives in support of his testimony.

Mr. Irwin’s experience has included architecture, engineering, surveying, design, and construction of buildings, bridges, civil infrastructure projects, furniture, temporary structures, construction safeguards, and complex/specialty/hybrid structural systems. He routinely consults on large scale, complex, and/or multi-party assignments, some of which require a multi-disciplinary scientific investigation methodology. Mr. Irwin has also managed exploratory demolition programs and laboratory and onsite structural/building science pathology testing, including on structures, buildings, bridges, and components with unknown, historic, or legacy construction components and techniques.

Mr. Irwin also possesses specialized certifications and training in constructed exterior building envelope performance, including moisture intrusion and mold infestation through, and within, roofing, windows, stucco, and adhered stone veneer cladding systems. His typical engagements have included evaluations of multi-million dollar residences, high-rise buildings, shopping centers/malls, hotels, complexes and developments of residential and commercial buildings, and regional/national chains of facilities, as well as construction-related accidents and disputes, including distinguishing between interwoven construction defect and design deficiency issues. Mr. Irwin has also personally renovated seven residences, including carpentry, roofing, siding, doors, windows, drywall, flooring, painting, HVAC, electrical, and plumbing work, as well as furniture design and construction. He also develops damage remediation options and costs for repairs and has consulted on the development of risk management programs for contractors.

Mr. Irwin has also addressed public safety concerns and emergency stabilization/ shoring requirements for severely damaged structures. Additionally, Mr. Irwin routinely investigates premises liability incidents and accidents in both the public and private sectors, with specialized experience and training within dynamic hospitality, restaurant, and retail environments, including displays and merchandise. He also possesses specialized training and certifications in slip-resistance testing, human factors, and biomechanics, which are typically applied to simultaneously evaluate engineered system performance and human interactions therewith. Mr. Irwin also serves on the ASTM committees for forensic engineering and pedestrian walkway safety, is a member of numerous related professional societies, and is a frequent guest speaker/trainer on related technical subject matter, including for regional/national corporations and trade organizations.

Primary Areas of Consulting

  • Building, Component and Material Evaluations
    Residential, industrial, and commercial buildings
    Concrete, steel, timber, and masonry bridges
    Foundations, basements, and crawlspaces
    Site features, pools, and buried civil engineering infrastructure
    Marine and underwater structures
    Structural and architectural component and material failures and testing
    Residential and commercial roofing and building envelope systems
    High-performance (green), historic, and legacy building materials and methods
    Finite element analysis (FEA) and building information modeling (BIM)
    High-rise buildings, complexes and communities, and regional/national chains of facilities
    Temporary structures, construction safeguards, and special event staging
    Designated lead of multi-disciplinary teams of investigative professionals
  • Damage Assessment and Remediation Evaluation

    Cause and extent of damage, as well as reparability, cost evaluations, and appraisals
    Post-fire, post-impact, post-explosion, and post-collapse catastrophic damage pattern analysis
    Hurricane, tornado, and straight-line wind evaluations, as well as hail
    Foundation and retaining wall subsidence and instability, including earth movement and sinkholes
    Construction vibration and demolition damage
    Underpinning/excavation failures during construction
    Flood damage, including wind/wave/surge effects, as well as site drainage issues
  • Construction Defects and Design Deficiencies
    Structural distress evaluation, including moisture intrusion and mold infestation
    Evaluation of construction contracts and documentation
    Contract document, code, ADA, and regulatory compliance
    Installed system performance evaluation and testing, including stucco and adhered stone veneer
    Chronic problem diagnosis, building pathology testing, and remediation design
    Construction material performance/installation requirements
    Wind and seismic (earthquake) structural design adequacy
  • Accident and Incident Evaluations
    Safety engineering examinations of constructed elements/components
    Premises liability incidents, including within dynamic hotel, restaurant and retail environments
    Walkway surface evaluations, including tribometry (slip resistance evaluation)
    Retail display/merchandise failures, including operational policies and procedures compliance
    Lighting, maintenance, and previous renovation adequacy evaluations
    Construction safety issues and responsibilities, including OSHA compliance
    Human factor and biomechanical affects, including comparative contributions to causation


  • Diplomate Forensic Engineer (DFE), National Academy of Forensic Engineers – 2019
  • Model Law Engineer (MLE), National Council of Examiners for Engineers and Surveyors (NCEES) – 2017
  • Certified XL Tribometrist (CXLT), Excel Tribometers, LLC – 2013
  • Certified Mold Remediator (CMR), Professional Mold Inspection Institute (PMII) – 2013
  • Certified Residential and Commercial Mold Inspector (CRMI, CCMI), PMII – 2013
  • Certified Roof Inspector – Residential & Commercial, Haag Education – 2019
  • Certified Faro 3D Scanner Operator, Faro/ Rimkus Consulting Group, Inc. (RCG) – 2017
  • Certified Ladder Inspector, Ladder Safety Institute – 2014
  • Certified Level 1 Infrared Thermographer, Snell/RCG – 2014
  • Certified Aerial Boom and Scissor Lift Operator, United Academy – 2012
  • Authorized Person for High Angle Fall Hazards, Catastrophe Career Specialties, LLC – 2012


  • National Academy of Forensic Engineers (NAFE) – Senior Board-Certified Member – 2019
  • National Society of Professional Engineers (NSPE) – 2018
  • Pennsylvania Society of Professional Engineers (PaSPE) – 2018
  • Philadelphia Society of Professional Engineers (PhSPE) – 2018
  • American Society of Safety Professionals (ASSP) – 2018
  • ASTM International – 2018
    • E58 Committee (forensic engineering) – 2019
    • E06 Committee (building pathology testing and performance) – 2020
    • F13 Committee (pedestrian walkway safety) – 2018
    • C11 Committee (EIFS and stucco) – 2020
    • C15 Committee (manufactured stone veneer) – 2020
    • D07 Committee (wood) – 2021
  • National Floor Safety Institute (NFSI) – 2019
  • National Council of Structural Engineering Associations (NCSEA) – 2018
  • Structural Engineers Association of Pennsylvania (SEAoP) – 2018
  • Delaware Valley Association of Structural Engineers (DVASE) – 2018


  • Bachelor of Science in Civil Engineering
    Lehigh University, Bethlehem, PA, 1998
  • Bachelor of Arts in Architecture
    Lehigh University, Bethlehem, PA, 1998

Licensed Professional Engineer in the States of:

Alabama, British Columbia (Canada), Connecticut, Delaware, District of Columbia, Florida, Georgia, Louisiana, Maine, Maryland, Massachusetts, Michigan, New Hampshire, New Jersey, New York, North Carolina, Ohio, Pennsylvania, Rhode Island, South Carolina, Texas, Vermont, Virginia, West Virginia
Model Law Engineer: National Council of Examiners for Engineers and Surveyors (NCEES)

Get In Touch