What Forensic Engineers Do
Forensic engineers investigate why structures, systems, and products fail — providing the technical foundation for insurance claims, litigation, and remediation decisions.
Forensic engineering is the application of engineering principles and scientific methods to investigate failures, accidents, and disputes involving the built environment, mechanical systems, and manufactured products. Unlike design engineers who create new structures and systems, forensic engineers work backward from a failure to determine its root cause. Their analysis answers the fundamental questions: what failed, how it failed, why it failed, and who bears responsibility.
These professionals are retained by insurance carriers, attorneys, property owners, and corporations whenever a failure results in property damage, personal injury, or financial loss. Their work product — typically a detailed written report supported by testing, calculations, and photographic documentation — serves as the technical backbone of insurance claims and legal proceedings.
Failure Analysis Methodology
Forensic engineers follow a structured investigative methodology that parallels the scientific method. The process begins with evidence preservation and scene documentation, including photographs, measurements, and collection of physical samples. The engineer then reviews relevant documents — design drawings, specifications, maintenance records, weather data, and witness statements — to establish the context surrounding the failure.
Laboratory testing and analysis follow, which may include materials testing (tensile strength, hardness, chemical composition), metallurgical examination, load calculations, computer modeling, and comparison to applicable codes and standards. The engineer develops and tests hypotheses about the failure mechanism, ultimately reaching conclusions supported by the evidence. This systematic approach is essential for producing opinions that withstand Daubert scrutiny in court.
Types of Forensic Engineering Investigations
Structural investigations address failures in buildings, bridges, parking structures, and other load-bearing systems. These include collapses, excessive deflection, foundation settlement, and deterioration from corrosion or environmental exposure. Structural forensic engineers evaluate whether failures result from design errors, construction defects, overloading, or inadequate maintenance.
Mechanical investigations focus on failures in machinery, HVAC systems, plumbing, elevators, and industrial equipment. These engineers determine whether failures stem from design flaws, manufacturing defects, improper installation, or inadequate maintenance and operation.
Materials investigations involve analyzing why building materials, metals, polymers, and composites fail prematurely. Corrosion, fatigue, creep, and manufacturing defects are common failure modes that require specialized laboratory analysis to identify and characterize.
The Role of Forensic Engineering in Litigation and Insurance
In litigation, forensic engineers serve as expert witnesses who explain technical failures to judges and juries. They testify about causation, standard of care, code compliance, and the reasonableness of design and construction decisions. Their opinions often determine whether negligence or a product defect can be established.
In insurance, forensic engineers help carriers evaluate claims by determining the cause of loss, distinguishing between covered and excluded perils, and assessing the scope and cost of necessary repairs. Their independent analysis provides an objective technical basis for claims decisions, particularly in disputes involving construction defects, weather damage, or equipment failures.
The Importance of PE Licensing
A Professional Engineer (PE) license is the most important credential for a forensic engineer. PE licensing requires a combination of education, supervised experience, and passage of rigorous examinations. It signifies that the engineer has met minimum competency standards established by the state licensing board and is authorized to seal engineering documents and offer professional opinions. In many jurisdictions, only licensed PEs can provide engineering opinions in legal proceedings. When retaining a forensic engineer, verify that they hold a current PE license in the relevant jurisdiction and discipline, and that their practical experience aligns with the specific technical issues in the case.
