People & Team
Our people are our greatest resource. Today, our agile, supportive team serves private and public clients from offices in San Dimas, CA and Tucson, AZ as we provide safe, sustainable, and reliable groundwater solutions.
David BauerCAD/GIS Illustrator
David has more than 34 years of experience in the water industry with involvement in the production of presentation and technical graphics. He is a graduate of Humboldt State University, where he received his Bachelor of Arts in Physical Geography, with minors in Natural Resources and Water Resource Policy. He serves as our GIS coordinator whose responsibilities include the organization of all GIS activities, database management and graphic creation within our technical reports.
Alex AritaSenior Associate Geohydrologist
Senior Associate Geohydrologist
With more than five years of experience, Alex has been involved in many different types of projects: new wells, groundwater monitoring, well rehabilitation, and well assessments. Well projects include municipal, agricultural, monitoring, and injection. Alex supervises conductor installation, pilot borehole drilling, reaming, well construction, development, aquifer testing, water quality sampling and analyses. Deliverables include proposals, technical specifications, DWSAPs, well design letters, pump design letters, and well summary reports. Alex is responsible for a monitoring network of 50 remote wells which includes groundwater level monitoring, transducer downloads and maintenance, and water quality sampling.
Mark Williams, PhD, PE
Dr. Mark Williams serves as the CEO of Geoscience. With his unique background combining engineering and geology, Mark brings a substantial depth of expertise and experience from his 25+ years working in the areas of water utility engineering and groundwater quality. Prior to joining Geoscience in 2014, Mark served as an Engineer with the Process Development Team at the Metropolitan Water District, and subsequently consulted on a variety or water treatment projects including the Doheny Desalination Project and numerous groundwater treatment projects. Mark has presented and published extensively in the areas of water treatment engineering and water quality.
Calvin AndersonAssociate Modeler
Calvin Anderson has two years of experience supporting our modeling team in the development of groundwater models and conducting model runs for a variety of groundwater resource projects. His experience includes organizing and interpolating water quality data as well as creating nitrogen and TDS loading criteria based on land use and recharge volume for an integrated model of the Upper Santa Ana River Basin.
Calvin has also supported modeling efforts in the completion of multiple Groundwater Sustainability Plans, including one for the Arlington Basin, as well as the Upper San Luis Rey Valley. He has also created a GIS-based tool to assist in the site selection for production and injections wells and recharge basins for various organizations.
David BarnesSenior Modeler
David Barnes, MEng
David has more than 13 years of experience performing groundwater modeling and regional water supply studies for municipal clients and public agencies, specializing in the development of groundwater, surface water and hydrogeologic models, as well as data processing and GIS to support modeling efforts. Additionally, David is experienced in well design and construction processes with wide-ranging experience in field hydrology, aquifer testing, and characterization methods. His experience has included assisting in the development of a regional groundwater model to support a Habitat Conservation Plan, where he assessed the impacts of water management decisions on shallow groundwater, streamflow, and riparian areas. David’s experience also includes a geohydrologic analysis of future groundwater production, assessing the future proposed pumping operations for a municipal wellfield. To complete the assessment, he developed a local groundwater flow model and also developed a solute transport model to assess water quality in the wellfield.
Matthew McCombAssociate Modeler
Matt is an Associate Modeler at Geoscience where he is involved in the construction of groundwater flow and solute transport modeling, geohydrologic investigations, data management, GIS applications, and visualization materials. Matt received a bachelor’s degree in geology from UC Santa Barbara and has nearly 4 years of professional experience working with groundwater and natural resource projects performed for private clients. Matt has constructed Petrel models for petroleum exploration and environmental compliance purposes, developed and maintained databases, and conducted professional mapping exercises for regulatory and litigation purposes.
Lindsay MotaAssociate Geohydrologist
Lindsay is an Associate Hydrologist at Geoscience involved in well design and construction management and basin studies. Prior to joining our team, Lindsay was an undergraduate teaching assistant at Colorado State University and taught Mineralogy, Optical Mineralogy, and Introduction to Geology. As a graduate teaching assistant, she taught Geology, Sedimentology and Stratigraphy, Optical Mineralogy, and Field Camp. She was an office assistant for the American Professional Geologists and spent time as a Laboratory Technician working with soil classification, and commercial site development.
Coral ShawSenior Associate Geohydrologist
Senior Associate Geohydrologist
Coral Shaw, GIT
Coral has nearly a decade of professional experience from working as a field geologist on over 20 well construction projects including high-capacity municipal supply wells, test boreholes, injection wells, and monitoring wells. Coral is experienced performing well construction inspection for tasks such as pilot borehole drilling and reaming, casing inspection and installation, air lifting and swabbing, development by pumping, and down-hole video logging. She has performed various pumping test analyses, including large scale pumping tests and water quality sample collection. Coral also prepares well siting reports, preliminary well design reports, well designs based on data collected during the drilling process, provide final pump design recommendations, and final summary reports.