Jill Johnson, P.G.

Jill Johnson is a Principal Hydrogeologist based in Florida with more than 20 years of experience focused on a wide range of environmental projects, including groundwater monitoring and reporting, contamination assessments, remedial evaluation and implementation, and environmental planning and compliance.

A determined client advocate, Jill has worked on a variety of contaminated site assessment and remediation projects for public and private clients. Her multi-disciplinary projects for large electric utility clients include ash pond closure feasibility evaluations, ash pond closure construction quality assurance, and innovative remediation projects. She has assisted clients with evaluating potential liabilities related to groundwater issues under U.S. EPA's Coal Combustion Residual (CCR) Rule, supported and directed groundwater assessments for CCR-related constituents, evaluated groundwater monitoring networks in relation to CCR Rule requirements, and designed innovative approaches for the remediation of arsenic in groundwater.

Jill has helped NASA manage assessment and remediation activities at more than ten sites under a RCRA Corrective Action program. She has also led the team assisting Pfizer in resolving challenging environmental issues at a complicated site for more than 15 years, which is nearing closure under the state regulatory program. Part of her work involved designing an innovative remedial system for in situ treatment of pesticides. Her work for these clients has been focused on site assessment, geochemical site characterization, geostatistical data evaluation, and optimization of groundwater monitoring networks.

Jill advances the state of the practice with publications and presentations on innovative site assessment techniques, selenium and uranium geochemistry, characterizing and remediating phosphate mining wastes, sediment dredging, brownfields redevelopment, and passive sampling. She is the 2018-2019 Chair of the Air and Waste Management Association (AWMA) Coastal Plains chapter and has served as President of the Northwest Florida Association of Environmental Professionals (FAEP). She has been Treasurer and Secretary of the Society of American Military Engineers (SAME) Emerald Coast Post and received the 2009-2011 Outstanding Service to SAME Award. She is currently a member of the Executive Committee for Auburn University's Geosciences Advisory Board and two professional advisory boards for Escambia County, Florida.

Contact Jill Johnson at This email address is being protected from spambots. You need JavaScript enabled to view it. or +1-850-483-5100.

Career Summary: Jill Johnson, P.G.

  • Specialties: CCR Groundwater; Site Assessment; Geochemistry; Groundwater Monitoring and Optimization
  • Practice Areas: Contaminated Site Assessment and Cleanup, Environmental Management, Waste Management
  • Disciplines: Hydrogeology, Geochemistry
  • Education: M.S., Geology, Hydrogeology Curriculum, University of Kansas; B.S., Geology, Magna Cum Laude, Auburn University
  • Registration: Professional Geologist in Florida, Alabama, Mississippi, and Louisiana; Alabama Profess. Hydrogeologist 1223
Geosyntec Consultants
Geosyntec is a consulting and engineering firm that works with private and public sector clients to address new ventures and complex problems involving our environment, natural resources, and civil infrastructure.

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