About Us


GEOSCIENCE Support Services Inc. is a leading groundwater consulting firm. We work with water utilities, government agencies, and private industry to overcome their most complex challenges in developing, managing and preserving groundwater resources.

Our Mission

We provide clients with the ‘hydrologic truth’— giving them the best path forward in doing so.

Our History

Founded in 1978 by Dr. Dennis Williams, GEOSCIENCE was one of the first hydrogeology firms in California established to provide consulting services to the groundwater industry. We are a trusted advisor to industry professionals and stakeholders—delivering solutions to groundwater supply, development, management and protection challenges that meet the changing needs of our clients.

Our Values

We take care of our clients by taking care of our employees.

Company Stats

GEOSCIENCE by the Numbers

Years in Business

38

GEOSCIENCE Clients

560+

Projects Completed

2,500+

Meet Our Team


Our staff is made up of a team of professional groundwater hydrologists and geologists, supported by experienced modeling and GIS professionals.

 

“At GEOSCIENCE, it’s our job to find the hydrologic truth.”

~ Dr. Dennis Williams, Founder & President

Service Areas


GEOSCIENCE partners with major water districts, municipalities, engineering firms, and government agencies to develop practical, customized solutions to the most complex groundwater issues.

Basin
Management

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Geohydrologic Studies

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Basin‐wide Sustainability

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Water
Wells

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Well Field Optimization

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Subsurface Intakes for Desalination

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Groundwater Modeling

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Legal
Support

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A COMPANY IS KNOWN BY THE CLIENTS IT KEEPS

The success of our approach is demonstrated by GEOSCIENCE's many clients—which includes most of the major water agencies in Southern California. We also serve clients in other parts of the state, as well as in South America, Mexico, Europe and the Middle East.

waterdistricts
citycountlocal
engineering-firms
private-industry
lawfirms

Select Projects


GEOSCIENCE has successfully completed more than 2,500 groundwater projects. We offer the full range of groundwater disciplines to help you effectively manage, develop, plan for and protect your groundwater resources.

Careers at GEOSCIENCE

Why GEOSCIENCE?

A career at GEOSCIENCE puts you at the forefront of this century’s most pressing environmental and humanitarian challenges – groundwater development, management, and protection. Solving these issues is our life’s work and passion.

If you think you’ve got what it takes to join our team, please submit your resume to jobs@gssiwater.com.

Contact Us


We’d love to hear from you about your latest project, question or challenge.

We are located at

Address: 620 Arrow Highway,
Ste. 2000, La Verne, CA, 91750

Phone: (909) 451-6650

Email: email@gssiwater.com

Email Us