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# Senior Groundwater Modeler

- **Company:** Water & Environmental Technologies
- **Location:** Kalispell, MT, United States (Remote available)
- **Experience:** Expert
- **Salary:** $94,000.0 - $150,000.0
- **Contract:** Permanent contract
- **Skills:** Testing (Software), Geographic Information Systems, Data Analysis, ArcGIS (Software), Computer Programming, Python (Programming Language), MATLAB, Routing, Data Processing, Modeling and Simulation
- **Published:** October 29, 2026
- **Apply:** https://www.indeed.com/viewjob?jk=e2b6654c2201cd5d

## About the Role

* Bachelor of Science (BS) degree in geology, hydrogeology, geological engineering, environmental engineering, civil engineering, or related field.

Preferred Education

 * Master of Science (MS) or Doctor of Philosophy (PhD) in hydrogeology, geology, or geological engineering.

Required Experience

 * A minimum of ten (10) years of professional groundwater modeling experience, including collaboration with in-house professionals, contractors, third-party consultants, and field personnel.

Preferred Certifications & Licenses

 * Certified Hydrogeologist (CHG), Professional Geologist (PG), or Professional Engineer (PE) registered in the applicable state they may be working in

Knowledge, Skills, and Abilities

 * Communication and Collaboration: Demonstrated ability to communicate and collaborate effectively within a multidisciplinary team. Possesses the strong technical communication skills required to translate complex numerical modeling concepts, calibration results, and model limitations to fellow modelers, field hydrogeologists, and project managers, ensuring seamless integration across all phases of the project
 * Advanced Groundwater Modeling: Experience with MODFLOW 6 model development and automation using FloPy and advanced MODFLOW 6 packages, including Streamflow Routing (SFR6), Multi-Aquifer Wells (MAW), Unsaturated Zone Flow (UZF6), and Water Mover (MVR6). Experience with advanced calibration and uncertainty analysis tools, including PESTPP-IES, highly parameterized calibration approaches, pilot-point parameterization, and predictive uncertainty evaluation is highly desirable. Proven ability to develop and apply numerical groundwater flow and transport models using the MODFLOW suite (MODFLOW 6, NWT, USG, MODPATH, MT3D/MT3DMS, BCT) and optimization tools like PEST within interface platforms such as GMS or Groundwater Vistas.
 * Applied Hydrogeology & Conceptualization: Deep understanding of groundwater flow mechanisms, aquifer systems, and quantitative hydrogeologic analysis, including practical field experience with aquifer testing.
 * Project-Specific Applications: Demonstrated experience executing modeling scopes for complex scenarios, including contaminant fate and transport, groundwater-surface water interactions, mine dewatering, environmental remediation, and water resource development.
 * Data Analysis & GIS: Proficiency in spatial analysis using ArcGIS, coupled with programming capabilities in Python, R, or MATLAB to process, automate, and interpret large-scale technical datasets.
 * Professional Communication & Execution: Strong analytical and problem-solving skills with a track record of authoring rigorous technical reports and translating complex findings for clients and regulatory agencies. Capable of executing independently while integrating seamlessly into a multidisciplinary technical team.

## Description

WET is seeking a motivated and technically skilled Senior Groundwater Modeler to support groundwater, mine permitting, hydrogeologic, environmental remediation, and water-resource projects throughout the Rocky Mountain region and western United States., The Senior Groundwater Modeler is responsible for supporting and managing groundwater modeling projects while ensuring exceptional client service and adherence to company quality standards., * Expanding Groundwater Modeling Team Capabilities: Collaborate with our existing groundwater modeling team providing technical insight and assistance to expand and refine our current modeling capabilities. Work with team members toward improving our internal processes of model construction and calibration to increase our output efficiency to clients. Provide internal review for models created by other team members for quality control. Ideally, the candidate will bring experience with MODFLOW 6 model development and automation using FloPy and help expand our team's capabilities in applying advanced MODFLOW 6 packages, including Streamflow Routing (SFR6), Multi-Aquifer Wells (MAW), Unsaturated Zone Flow (UZF6), and Water Mover (MVR6).

 * Business Development: Support firm growth by partnering with senior leadership on business development initiatives, including writing technical proposals, participating in client-facing presentations, identifying potential projects, and accurately scoping complex modeling tasks for future groundwater modeling projects.
 * Numerical Modeling & Simulation: Construct, calibrate, and execute 3D groundwater flow and contaminant transport models (utilizing the MODFLOW suite, PEST, and interfaces like GMS or Groundwater Vistas) to perform predictive simulations, water-budget calculations, and rigorous sensitivity/uncertainty analyses.
 * Conceptual Site Development: Synthesize diverse geologic, hydrologic, pumping, and water-quality data to build robust conceptual site models (CSMs) and establish accurate boundary conditions and model input datasets.
 * Data Analysis & Workflow Automation: Interpret complex hydrogeologic field data and leverage GIS, Python, MATLAB, or R to streamline data processing, automate modeling workflows, and generate high-quality cross-sections, maps, and technical visualizations.
 * Technical Reporting & Communication: Author comprehensive model documentation, technical memoranda, and reports; present complex quantitative findings clearly to multidisciplinary teams, clients, and regulatory agencies.
 * Project Execution & Field Support: Support the design of groundwater investigations and aquifer testing programs; assist leadership in developing work plans, project scopes, cost estimates, and competitive proposals.
 * Quality Assurance & Compliance: Maintain meticulously organized project files, calculation logs, and model documentation for QA/QC reviews, while strictly adhering to firm health and safety policies.

Work Environment

The position will primarily involve office-based technical work, including groundwater modeling, data analysis, GIS, report preparation, and project coordination. Periodic field work and travel to project sites may be required to confirm field conditions. The majority of field activities such as aquifer testing, groundwater sampling, monitoring well installation oversight, aquifer testing, water-level measurements, site inspections, and other hydrogeologic investigations will be performed by other WET personnel.