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Forensic Safety Analysis for Personal Injury and Product Liability Accidents

Dr. Daniel A. Johnson

Certified Professional Ergonomist
Certified XL Tribometrist

  Specializing In These Areas:

  • Investigation

  • Report Writing

  • Sworn Court Testimony


Who is Daniel Johnson?

What is Human Factors? (Ergonomics)

Why a Psychologist?

Jurisdictions in which Dr. Johnson has testified in trial or deposition:  

Alaska, California, Colorado, Florida, Kansas, Missouri, Montana, Nevada, Oregon, Washington State and Washington DC (House of Representatives).


Mailing Address: 
6221 Swayne Drive NE
Olympia, WA 98516

Phone:  360-456-3434
FAX:    360-456-5521

*Rates Provided Upon Request*


Email Dr. Johnson: DAJINC1@mac.com


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Who is Daniel Johnson?

When Dr. Johnson left Douglas Aircraft in Long Beach, California, after completing his work on the certification program for the MD-80 aircraft, he moved to Washington State in 1980.  In 1984, he consulted on his first forensics case and has been working in that field ever since. He and his wife, Dr. Pamela Farr, live in Olympia. 

What is Human Factors? (Ergonomics)

When psychology is applied to the design of equipment or the environment (such as roadways) it is called human factors, or ergonomics. In the design phase we work with engineers to ensure that products and the environment are built so as to take into account the abilities and limitations of those using them.

In the post-injury phase we, as forensic ergonomists, analyze the product or environment to determine why a person thought or behaved in a manner that brought about the injury.

Why a Psychologist?

Most injury events (falls, highway collisions, on-the-job injuries) occur because of how people think and behave. Psychology is the study of how people think and behave. It is relevant to most injury events.

Engineering is the study of how “things” behave – how strong a material is, its failure rate over time, etc. It, too, may be relevant to a given injury event. But often injury events occur in the absence of any structural or mechanical failure.

To use an engineer to explain why and how a person behaved in a certain instance would be as inadvisable as asking a psychologist to explain why a structure or mechanical device failed.

 Other Related Sites:
Human Factors and Ergonomics Society (HFES)          
Board of Certification in Professional Ergonomics           
Excel Tribometers, LLC