Senior Hydrogeologist

Science West Chester, Pennsylvania


WESTON is seeking a Senior Hydrogeologist that will be responsible for helping to evaluate and visualize proposed remedies for sites of varying scale that are sufficiently complex to warrant the use of digital site conceptual models and numerical modeling. A variety of modeling packages may be used and reports summarizing the modeling efforts will typically be required.  

Location: West Chester, PA

Knowledge, Skills and Abilities:

  • B.S. or M.S. degree in Geology/Hydrogeology
  • 10+ years’ experience developing 3D conceptual site models and performing numerical simulations of groundwater flow and contaminant transport.  Experience should include:
    • Groundwater flow model construction and calibration using finite difference or finite element packages
    • Contaminant transport simulation using MT3DMS or other industry standard tools
    • Experience using MODFLOW/MT3D preprocessors (Groundwater Vistas preferred)
    • Work with existing models developed or inherited by Weston and construct and calibrate a model from scratch
  • Experience with one or more of the following is a plus:
    • MODFLOW-USG (a new unstructured grid implementation of MODFLOW)
    • PEST inverse modeling for calibration (parallelized versions preferred)
    • More simplistic analytical modeling tools and techniques
    • Geospatial analysis with GIS (ESRI products preferred)
    • Database construction and management
    • 3D conceptual site model development using Ctech’s EVS/MKS or Earth Volumetric Studio
    • 3D conceptual site modeling with EarthVision (by Dynamic Graphics, Inc)
    • Familiarity with the R statistical library
    • Scripting languages (python, UNIX, powershell, fortran, VBA, java, or C++ preferred)
    • Geostatistics
    • Vadose hydrology


  • Synthesizing, evaluating, and processing large volumes of geologic, hydraulic, and analytical data for model input as well as post-processing, tabulating, and visualizing model output. 
  • Train/mentor junior staff on one or modeling techniques. 
  • Non-modeling office tasks may include preparation and review of work/sampling plans, remedial investigation reports, preliminary site assessments, site inspection reports, and other technical memoranda. 
  • Field responsibilities such as site assessments, drilling oversight, field sampling of multiple media, aquifer testing, and other methods of data collection may be required on occasion.

At Weston Solutions you will do meaningful work and make valuable contributions

A career at Weston means professional growth and access to diverse opportunities in a thriving, interconnected, and supportive community that works together to make a difference in the environment. We take pride in knowing that our people feel they do meaningful work and make valuable contributions to their teams because recent employee survey results show that over 90% agree on these points. Top talent from all paths—recent graduate, ex-military, experienced, and leaders—join Weston to do meaningful work with a focus on dynamic skills growth and long-term career progression. 

We fully invest in our people: Weston provides a competitive and comprehensive benefits package program that offers employees high value options with solid financial protection, meeting the individual needs of its people and their families 

  • Medical, Dental, Vision, 401K with base and matching employer stock contributions
  • Parental leave benefits
  • Paid time off to include: vacation, sick and holiday time
  • Critical illness and accident plans
  • Work/Life flexibility
  • Professional development opportunities