Newton's record from the Principia of his personal observations of Halley's Comet
 






Our Staff

Our staff of five consultants includes four Licensed Professional Engineers (California), a Patent Agent, three engineering Ph.D.'s, and a Ph.D. in pharmacology.

Devinder S. Grewal, Ph.D., P.E.
Mechanical Engineer / Biomechanics / Patent Agent

Eric Rossetter, Ph.D., P.E.
Mechanical Engineer

Benjamin J. Ewers III, Ph.D., P.E.
Mechanical Engineer / Biomechanics

Alan C. Donelson, Ph.D.
Pharmacology / Toxicology / Applied Statistics / Motor Vehicle Risk Analysis

Yomi Agunbiade P.E.
Mechanical Engineer / Project Management / Construction Consulting / Dispute Resolution

The engineers and scientists of Principia together have more than 75 years of experience in investigating accidents and product failures. They have investigated hundreds of accidents and failures, ranging from every-day product failures to highly-publicized accidents and disasters.

© Principia Engineering, Inc. | San Francisco, California | 415.398.3018