We are a forensic expert consulting firm specializing in accident reconstruction, construction safety, and the biomechanics of human motion and injuries, including walkway safety.


Mark Blanchette, PhD


Assistant: Christina Huizar


John Brault, MS


Assistant: Deby Herrera

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Brad Rutledge, MS PE

Accident Reconstruction & Biomechanics

Assistant: Liz Harrington

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Cenie Walker, MS CHST

Construction & Premises Safety

Assistant: Deby Herrera

Why Choose Semper Scientific?

  • Over 30 years of experience advising our clients in the legal community.
  • More than 9,000 technical investigations performed.
  • Expert testimony in more than 400 trials.