Dennis E. Williams, Ph.D., PG, CHG

Founder and President
909.451.6640
dwilliams@gssiwater.com

Dr. Dennis Williams is the founder and president of GEOSCIENCE. He has more than 45 years of experience in groundwater hydrology, having directed geohydrologic investigations domestically and globally on groundwater supply, development and management, including the design and supervision of more than 1,000 deep large-scale municipal water supply wells.

Dr. Williams pioneered the use of subsurface intakes using slant wells for feed water supply—an environmentally sound method of capturing seawater for use in desalination plants—designing and constructing the first slant wells for testing near Dana Point and Monterey, CA. He is also sought after for his expertise in well design and siting.

Dr. Williams is author of more than 50 publications on groundwater and wells. He served as chief reviewer for the American Society of Civil Engineers (ASCE) Hydraulics of Wells (2014). Most recently, Dr. Williams served as the author of Chapter 13 (Slant Wells) in the book Intakes and Outfalls for SWRO Desalination Facilities (Springer 2015), and as the principal author of the Handbook of Ground Water Development (John Wiley & Sons, 1990). Dr. Williams also serves on many expert and blue ribbon panels for the groundwater industry, and frequently testifies as an expert in groundwater hydrology in civil litigation.

Dr. Williams is an active member of numerous professional associations relating to the groundwater industry, including the American Water Works Association (member, National Water Well Standards Committee), American Society of Civil Engineers, National Groundwater Association, Orange County Water Association, Association of Special Districts San Bernardino County and the American Institute of Hydrology, among others. He is a frequently sought after speaker at workshops, conferences and symposia on a variety of groundwater issues.

Education and Professional Credentials:

B.S., Geology, University of Redlands
M.S., Ground Water Hydrology, New Mexico Institute of Mining and Technology
Ph. D., Hydrology. New Mexico Institute of Mining and Technology
California Professional Geologist (No. 461)
Certified California Hydrogeologist (No. 139)
Certified Hydrologist- Groundwater (American Institute of Hydrology) (No. 355)
DWilliams

Dr. Williams pioneered the use of subsurface intakes using slant wells for feed water supply—an environmentally sound method of capturing seawater for use in desalination plants.