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John Gilewicz, PE, CXLT, CIT

Principal Structural Engineer


Nashua, NH, Service Center
165 Ledge Street
Suite 7
Nashua, NH






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  • Professional summary

    John is a licensed Structural Engineer in multiple jurisdictions throughout the United States. Prior to joining EFI, John owned and operated his own consulting firm, specializing in the design, construction, and forensic analysis of a wide array of structures and facilities. During the 25 years managing the company, John was responsible for the design of more than 15,000,000 square feet of commercial, retail, and institutional space. In addition, John has provided extensive Structural Analysis and Design services to a wide array of Fortune 500 companies across the United States, Canada, and Mexico. Clients include General Motors, Delphi, Anheuser Busch, and Alcoa Aluminum.

    John has also provided services to various governmental agencies including the U.S. Army Corps of Engineers, the United States Navy, and the National Aeronautics and Space Administration.

    John’s work often involved the design of complex systems and facilities, including large scale industrial foundations and framing for manufacturing and process equipment requiring dynamic analysis. This work included the dynamic analysis of large complex foundations as well as the investigations of failed foundations and the design of foundation repairs.

    In addition to more than 25 years of Professional Design experience, John has also performed numerous forensic investigations for all types of structures including single family residences, commercial structures, and industrial facilities. This work has included providing Expert Witness testimony in New York, Massachusetts, Maine, and Vermont.

    John is also a member in the American Society of Civil Engineers, the American Concrete Institute, the American Institute of Steel Construction, the American Wood Council, and the National Society of Professional Engineers.

    John has specialized in the detailed analysis of slip and fall and trip and fall losses. He is a Certified Tribometrist, and has provided extensive code analysis based on current and historic codes. He is also a Certified Infrared Thermographer, and has analyzed numerous roofs to determine the extent of water infiltration beneath roof membranes. He is also an Unmanned Aerial Vehicle operator, licensed by the FAA.

    John’s expertise includes, but is not limited to:

    • Analysis, design, and repair of large foundations.
    • Design of wood, timber, and masonry framed structures.
    • Design of steel framed commercial, institutional, and retail facilities.
    • Construction failure investigations.
    • Slip and Fall Investigations.
    • Trip and fall investigations.
    • Current and historic Code and Standards analysis and interpretation.


  • Education

    Bachelor of Science in Civil Engineering, Columbia University in the City of New York, New York, NY, 1981


  • Certifications

    Professional Engineer, Connecticut, #21194

    Professional Engineer, Florida, #81453

    Professional Engineer, Illinois, #062-052741

    Professional Engineer, Maine, #14302

    Professional Engineer, Massachusetts, #33699

    Professional Engineer, Michigan, #43447

    Professional Engineer, Minnesota, #26664

    Professional Engineer, New Hampshire, #15133

    Professional Engineer, New York, #068208

    Professional Engineer, Ohio, #E-63218

    Professional Engineer, Pennsylvania, #PE05069

    Professional Engineer, Rhode Island, #0011917

    Professional Engineer, Wisconsin, #33212

    Professional Engineer, Vermont, #18.0115148

    National Engineering Registration, NCEES, 17-419-63

    Certified Excel Tribometrist (2016)

    Certified Infrared Thermographer (2020)

    FAA Part 107 Small Unmanned Aircraft Systems (sUAS) Remote Pilot Certification





  • Disciplines
    • Engineering - Structural, Building
    • Engineering - Construction Defect Evaluations
    • Engineering - Property Condition Assessments
    • Engineering - Roof Assessments
    • Engineering - Accident Reconstruction
    • Engineering-Accident Reconstruction
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