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 electric transmission life cycle services, groundwater monitoring and reporting, contamination assessments, remedial evaluation and implementation, and environmental planning and compliance.

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 electric transmission life cycle services, 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 groundwater compliance, 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 leads Geosyntec's Electric Transmission Sector, focused on providing environmental and engineering consulting services for the life cycle of transmission assets, including planning, permitting, construction, and operations. Her experience in electric power delivery encompasses 34.5kV through 345kV lines and substations. 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 20 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 past Chair of the Air and Waste Management Association (AWMA) Coastal Plains chapter and is serving on the AWMA Florida Section board. She has served as President of the Northwest Florida Association of Environmental Professionals and 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 of 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

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