johnPrincipal Groundwater Hydrologist

John is an expert in quantitative hydrogeology and numerical modeling. His experience includes basin water resource studies, groundwater supply planning, including for wellfield operations and expansion, and groundwater quality protection. He has also provided contaminant migration assessments for landfills and sites undergoing environmental study and remeditation.

John has developed and applied groundwater models in a variety of geologic settings in the western United States, including alluvial aquifers and deep basalt aquifer systems in the Pacific Northwest’s Columbia River Basalt Group. He is experienced in developing models with a variety of modeling software, including the U.S. Geological Survey’s suite of finite-difference (MODFLOW) models, the unsaturated zone model MODFLOW-SURFACT, the PEST suite of tools for inverse calibration, and the Groundwater Vistas graphical user interface that supports these tools. He also has developed and applied numerous finite-element models using the Dutch software MicroFEM®.


  • Registered Geologist, Oregon
  • Licensed Geologist and Hydrogeologist, Washington


  • MS, Hydrology, University of Arizona
  • BS, Hydrology, University of Arizona

Safety Training

  • First Aid, CPR, and AED

Contact John at 971.200.8523 or email him below

Email John