Thomas D Gillespie, P.G.

Thomas D Gillespie, P.G. is a geology and environmental expert specializing in groundwater contamination and environmental forensics. With a career spanning geology, hydrogeology, and environmental evaluation, he brings a multidisciplinary perspective to litigation work. His work centers on investigating groundwater contamination, assessing environmental impacts, and evaluating whether geo-hazards have contributed to site-specific issues.

Mr. Gillespie has been retained in numerous expert witness and consulting engagements across the United States, involving cases related to mining, oil and gas, and karst geology. His M.S. in Geology from Rutgers University, along with his Professional Geologist licenses in NH, NE, CA, TX, and WY, 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 environmental and geological matters.