September 2026

Top 5 fire investigation and expert witness firms

Of the 177 fire investigation and expert witness firms listed in the OpenFire directory in September 2026, these profiles were viewed most by people and AI assistants.

  1. #1

    Jensen Hughes logo

    Jensen Hughes

    Fire safety experts at the forefront of hazard prevention.

    Consultancy 21–100 people 73 offices
    Building safety disputes CFD modelling Compartmentation +13 more
    Helsinki, Uusimaa · HQ View firm
  2. #2

    Nacional Fire logo

    Nacional Fire

    Fire projects, AVCB licensing and installation across Brazil.

    Supplier 1–5 people Est. 2024 1 office
    Detection & suppression testing Alarm monitoring Building safety disputes +45 more
    São Paulo, São Paulo View firm
  3. #3

    E

    Efectis

    Fire and explosion safety experts — from the material to the structure.

    Consultancy 100+ people 8 offices
    CFD modelling Compartmentation Evacuation modelling +11 more
    Saint-Aubin, Île-de-France · HQ View firm
  4. #4

    Reax Engineering logo

    Reax Engineering

    Fire experts — building/fire code consulting and fire science.

    Consultancy 1–5 people 1 office
    CFD modelling Evacuation modelling Fire investigation +5 more
    Berkeley, California View firm
  5. Joint #5

    AC

    AED Consulting

    Registered C10 fire engineers providing a comprehensive service.

    Consultancy 6–20 people 1 office
    Building safety disputes CFD modelling Evacuation modelling +3 more
    Sydney, New South Wales View firm
  6. Joint #5

    Hawkins logo

    Hawkins

    Employee-owned forensic investigators of fires, explosions and failures.

    Consultancy 100+ people Est. 1980 17 offices
    Building safety disputes Fire investigation Insurance & loss investigation +1 more
    London, England · HQ View firm
  7. Joint #5

    J.S. Held logo

    J.S. Held

    Global forensic consulting with a dedicated fire origin and cause practice.

    Consultancy 100+ people Est. 1974 11 offices
    Building safety disputes Fire investigation Insurance & loss investigation +1 more
    Jericho, New York · HQ View firm

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How the rankings work

Firms are ranked by how often their OpenFire directory profile was viewed during the calendar month, by people and by AI assistants. Search-engine crawlers, other automated traffic and link previews are not counted. Firms with equal views share a rank.

A firm with offices in several countries, or working across several categories, is ranked in each of them on the same monthly total. A ranking is only published where enough firms are listed and viewed for it to be meaningful.

A ranking reflects interest in a firm's listing. It is not an endorsement, and it is not a check of a firm's competence, certification or accreditation.