Gary Wealthall, Ph.D.

Gary Wealthall is a Senior Principal Consultant based in United Kingdom with more than 25 years of experience focused on contaminant hydrogeology research and practice. He advises regulatory authorities and clients in the chemical, waste disposal, land development, and insurance industries. Gary is the Managing Director of Geosyntec’s consulting business in the United Kingdom and Ireland.

Gary Wealthall is a Senior Principal Consultant based in United Kingdom with more than 25 years of experience focused on contaminant hydrogeology research and practice. He advises regulatory authorities and clients in the chemical, waste disposal, land development, and insurance industries. Gary is the Managing Director of Geosyntec’s consulting business in the United Kingdom and Ireland.


Gary specializes in the development and application of high-resolution site characterization methodologies for the selection, design and implementation of advanced remediation technologies. He serves as a subject matter expert for industry clients in Europe, North America, South America and South Africa.

An Adjunct Professor at the University of Toronto, Gary was previously a Principal Research Scientist with the British Geological Survey and Research Fellow at the University of Sheffield. Gary is an Editorial board member of QJEGH and has published numerous research papers and best-practice guidance documents on the behavior of dense and light non-aqueous phase liquids (DNAPLs and LNAPLs) in intergranular and fractured bedrock aquifers and aquitards. He is co-author of a number of best-practice documents, including a Guide for NAPL Migration in Sediments (ASTM, 2019), Integrated DNAPL Site Characterization and Tools Selection (ITRC, 2015), and a Generic Work Plan to Assess Dense Non-Aqueous Phase Liquid Mobility in the Subsurface at Manufactured Gas Plant Sites (EPRI, 2015), and An illustrated handbook of LNAPL transport and fate in the subsurface (CL:AIRE, 2014). He has significant experience as a technical training instructor on leading-edge professional development courses on five continents, including co-presenter of the prestigious Princeton Remediation Courses.

Contact Gary Wealthall at This email address is being protected from spambots. You need JavaScript enabled to view it. or +1-519-822-2230.

Career Summary of Gary Wealthall, Ph.D.

  • Specialties: Site Investigation and Remediation; Groundwater Assessment and Remediation; Sediment Assessment and Remediation; Risk Assessment and Applied Toxicology; Environmental Management Assessment and Systems
  • Practice Areas: Contaminated Site Assessment and Cleanup, Environmental Management
  • Disciplines: Chemical Engineering, Environmental Engineering, Chemistry
  • Education: Ph.D., Environmental Engineering, University of Sheffield, 2002; M.S., Hydrogeology and Groundwater Chemistry, University of Reading, 1993; B.S., Chemistry, Nottingham Polytechnic (now Nottingham Trent University), 1990
  • Filter Text People: Gary Wealthall is a Senior Principal Consultant based in United Kingdom with more than 25 years of experience focused on contaminant hydrogeology research and practice. He advises regulatory authorities and clients in the chemical, waste disposal, land development, and insurance industries. Gary is the Managing Director of Geosyntec’s consulting business in the United Kingdom and Ireland. Gary specializes in the development and application of high-resolution site characterization methodologies for the selection, design and implementation of advanced remediation technologies. He serves as a subject matter expert for industry clients in Europe, North America, South America and South Africa. An Adjunct Professor at the University of Toronto, Gary was previously a Principal Research Scientist with the British Geological Survey and Research Fellow at the University of Sheffield. Gary is an Editorial board member of QJEGH and has published numerous research papers and best-practice guidance documents on the behavior of dense and light non-aqueous phase liquids (DNAPLs and LNAPLs) in intergranular and fractured bedrock aquifers and aquitards. He is co-author of a number of best-practice documents, including a Guide for NAPL Migration in Sediments (ASTM, 2019), Integrated DNAPL Site Characterization and Tools Selection (ITRC, 2015), and a Generic Work Plan to Assess Dense Non-Aqueous Phase Liquid Mobility in the Subsurface at Manufactured Gas Plant Sites (EPRI, 2015), and An illustrated handbook of LNAPL transport and fate in the subsurface (CL:AIRE, 2014). He has significant experience as a technical training instructor on leading-edge professional development courses on five continents, including co-presenter of the prestigious Princeton Remediation Courses.

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