John C Fetzer, PhD

John C Fetzer, PhD is a Chemistry & Chemicals expert specializing in hydrocarbon and petroleum-related litigation. With a career spanning analytical chemistry, chromatography, and spectrometry, he brings a robust scientific framework to litigation work. His work centers on investigating hydrocarbon compositions, assessing chemical processes, and evaluating whether industry standards in petroleum engineering have been met.

Mr. Fetzer has been retained in numerous expert witness and consulting engagements across the United States, involving cases related to gasoline, diesel, oil, wax, and asphalt analysis. His Doctor of Philosophy in Analytical Chemistry, along with his designation as a Fellow of the Royal Society of Chemistry, reinforce his ability to deliver objective, defensible analyses. He is regularly engaged by both plaintiff and defense counsel to provide clear, independent determinations of causation in disputes involving complex chemical compositions and processes.