Pat Hoban, PG

President & Senior Geologist

As a Senior Geologist for Weber, Hayes and Associates, Mr. Hoban has conducted hundreds of environmental assessments of properties located throughout California. Current responsibilities include the management and implementation of contaminant delineation studies; hydrologic assessments, remedial action and property transfer assessments. He has worked closely with local, State and Federal regulatory agency personnel while conducting agency-required investigations.

Craig Drizin, PE

Principal Engineer

As a Senior Civil and Environmental Engineer for Weber, Hayes and Associates, Mr. Drizin designs and engineers water supply and wastewater treatment systems, and leads environmental cleanups.

Jered Chaney, PG

Project Geologist

Mr. Chaney leads management and field work for conducting environmental investigations and remediation, including the supervision of UST closures, remedial excavations, soil and groundwater contaminant characterizations, soil vapor intrusion assessments, and management of groundwater monitoring programs.

Shawn Mixan

Project Engineer

Mr. Mixan leads field activities and prepares technical reports for environmental investigations, remediation, and water resource projects. Specifics include soil & groundwater site characterizations, in-situ remediation, remedial soil excavations, drinking water & wastewater system design. Additional expertise includes compost facility design & regulatory compliance. Mr Mixan helps manage our drinking water system portfolio as a certified Distribution (D2) and Treatment (T2) Operator.

Harrison Hucks

Senior Scientist

Mr. Hucks completes groundwater, soil, and soil vapor investigations throughout the tri-county area. He is well-versed in stormwater management for large and small scale construction and cannabis projects. Mr. Hucks stays up-to-date with funding programs, connecting projects to funding sources to stay keep budgets cost-effective.

Ryan Nyberg

Staff Geologist

Mr. Nyberg is a recent earth science graduate from the University of California Santa Cruz and our newest member here at Weber Hayes. He handles site investigations, geologic logging, groundwater/soil/vapor sampling, and report writing. He is a big addition to the Weber Hayes team and already an irreplaceable member.

Laura Garcia


Ms. Garcia manages all phases of corporate accounting including payroll, accounts payable, accounts receivable, business insurance, purchasing, ESOP administration, and financial planning. She also performs the responsibilities of Human Resources Benefits Administrator and Office Manager. Ms. Garcia has previously served roles at the City of Watsonville Community Development Department, County of Santa Cruz and as CFO of a local Concrete Construction Company.

Shaun Ersoy

IT Administrator & Staff Scientist

Shaun is our information technology specialist. He supports our network infrastructure, providing us with up to date technology and services to better support our business processes and roles which in turn helps us better serve our customers and community. Additionally, Shaun also conducts Phase I Environmental Site Assessments and provides support to our Engineers and Geologists here at Weber Hayes & Associates.

Elizabeth Fisher

Administrative Support

Elizabeth is our eyes and ears in the office. She supports with all in house office duties to keep us up and running.

Solving environmental & water resource challenges since 1988