Groundwater Modeler: MODFLOW & EarthVision Specialist

Navarro Research; Las Vegas (NV); On-site; USD 90,000 - 130,000; Full time

Benefits offered by this job

Health Care Plan (Medical, Dental &amp

Retirement Plan (401k)

Life Insurance (Basic, Voluntary &

Paid Time Off (Vacation & Public),

Short Term & Long Term Disability

Job summary

Navarro Research and Engineering seeks a skilled Groundwater Modeler in Las Vegas, NV to develop and calibrate MODFLOW-based groundwater models for NNSS. You will integrate EarthVision data, run uncertainty analyses, and produce technical deliverables for client communications.

The role covers data evaluation, visualization, and collaboration with multi-disciplinary teams to support site-specific groundwater decisions, requiring strong technical judgment and clear communication.

Qualifications

• Bachelor’s degree in hydrogeology, geology, hydrology, geoscience, environmental science, civil engineering, environmental engineering, or a closely related technical discipline is required.
• Demonstrated experience developing or supporting groundwater models using MODFLOW.
• Demonstrated experience with model optimization tools (such as PEST) and Monte Carlo or equivalent uncertainty approaches.
• Demonstrated experience using EarthVision for geologic or hydrogeologic model development, visualization, and interpretation.
• Working knowledge of groundwater flow principles, stratigraphy, hydrogeologic conceptual site models, model calibration, sensitivity evaluation, and technical documentation.
• Ability to evaluate and integrate large technical datasets, including water-level data, hydraulic properties, geologic units, pumping or recharge information, and other model-supporting data.
• Ability to prepare clear technical deliverables, communicate modeling assumptions and results, and work effectively with multidisciplinary technical teams.
• Strong attention to detail, data quality, documentation, file organization, and technical accuracy.
• Ability to work from Navarro’s Las Vegas, Nevada office and support groundwater modeling activities for NNSS.

Responsibilities

• Develop, maintain, calibrate, and document groundwater flow and contaminant transport models for NNSS using the MODFLOW suite of tools.
• Use EarthVision to develop, visualize, and interpret geologic and hydrogeologic data, including stratigraphic surfaces, model layers, and conceptual site model elements.
• Compile, review, and evaluate groundwater, geologic, hydrologic, hydraulic, contaminant concentration, and site characterization data to support model development, calibration, and refinement.
• Prepare model input files, boundary conditions, hydraulic parameters, stress packages, calibration targets, model outputs, and supporting technical documentation.
• Evaluate model results, perform sensitivity checks, assess uncertainty, and support interpretation of groundwater flow conditions and site-specific hydrogeologic behavior.
• Generate maps, figures, cross sections, tables, model visualizations, and technical summaries to support project deliverables and client communications.
• Coordinate with hydrogeologists, geologists, engineers, environmental scientists, project managers, and client representatives to align modeling activities with project objectives, schedules, and quality requirements.
• Apply quality assurance, configuration control, data management, and technical review practices for modeling files, datasets, calculations, and deliverables.
• Support technical reports, presentations, work planning, and project meetings related to groundwater modeling and environmental support activities at NNSS.

Skills

MODFLOW

EarthVision

Data evaluation

Visualization

Modeling

Uncertainty analysis

PEST

Monte Carlo methods

GIS

Python

R

Education

Bachelor’s degree in hydrogeology, geology, hydrology, geoscience, environmental science, civil engineering, or related discipline

Tools

EarthVision

MODFLOW-related tools

ModelMuse

Groundwater Vistas

MODPATH

MT3DMS

RT3D

PEST

Job description

Navarro Research and Engineering seeks a skilled Groundwater Modeler in Las Vegas, NV to develop and calibrate MODFLOW-based groundwater models for NNSS. You will integrate EarthVision data, run uncertainty analyses, and produce technical deliverables for client communications.

The role covers data evaluation, visualization, and collaboration with multi-disciplinary teams to support site-specific groundwater decisions, requiring strong technical judgment and clear communication.