John Zeirke, P.E.
Forensic Mechanical Engineering & Accident Reconstruction
Independent engineering analysis for complex accidents, failures and fires.
Expertise
Forensic Investigation & Reconstruction
Delivering defensible conclusions through inspections, evidence review, technical analysis, reporting, and expert testimony.
Accident Reconstruction
Collision analysis using physical evidence, vehicle data, scene documentation, video, and engineering principles.
Mechanical Failure Analysis
Root cause analysis of failures involving mechanical components and systems.
Vehicle & Equipment Fire Investigation
Origin and cause investigation of vehicle and equipment fires using principles of the Scientific Method.
Additional Litigation Support
In addition to core forensic engineering services, JZ Engineering provides technical support and expert witness testimony for product defect and liability claims.
Product Liability
Evaluation of design intent, failure modes, safety-related issues, recalls, and claimed product defects.
Expert Witness Services
Technical case review, written reports, deposition testimony, trial testimony, rebuttal analysis, and litigation support.
Featured Case Example
Video-Based Crash Reconstruction and Driver Response Evaluation
Dash cam video, drone reference measurements, and frame-by-frame analysis were used to evaluate vehicle speed, timing, position, and driver response.
The video analysis was compared with other available evidence, including crash data when it later became available. This type of work helps attorneys and insurers evaluate what the evidence supports, especially when timing, speed, and perception-response issues are central to the case.
Featured Expert
John Zeirke, P.E.
Forensic Mechanical Engineer & Accident Reconstruction Expert
JZ Engineering is led by John Zeirke, P.E., a mechanical engineer with more than 20 years of combined design and forensic experience. Read More
His background includes product design and development involving large mining equipment and on-road vehicles, along with forensic work involving accident reconstruction, mechanical failures, product defects, recalls, and fire-related matters.
- Licensed Professional Engineer
- ACTAR accredited reconstructionist
- Certified Vehicle Fire Investigator
- FAA Part 107 drone pilot
Client Testimonials
Trusted Forensic Engineering Support
Attorneys rely on JZ Engineering for clear communication, timely investigation, and technical analysis that helps support complex claims and litigation matters.
“I retained John for a complex project in 2025 involving the analysis of origin and cause of a fire that consumed an expensive concrete pump truck. John was professional, responsive, and easy to understand. I will use his services in the future.”
Evan Beauchamp
Attorney
“John’s mechanical understanding led him to the source of my client’s engine damage. His speedy investigation helped my office prepare for mediation and resulted in a good settlement for my client.”
James A. Reichert
Attorney
Have a Case You’d Like to Discuss?
JZ Engineering is available for case consultation, inspections, expert review, and time-sensitive evidence evaluation.
Based in Minnesota. Serving clients throughout the Midwest and nationwide.