Groundwater Modeler - Part TimeTrue Environmental

Groundwater Modeler - Part Time

Location: United States
Workplace: Hybrid
Job type: Part Time
Posted: Posted November 13, 2026

Assist with numerical groundwater flow and transport model development
Requires coursework in hydrogeology and basic modeling software exposure
Master's degree and prior consulting internship are preferred
Part-time up to 25 hours per week in Phoenix or remote

Matrix New World Engineering, a part of True Environmental and its partner firms, have united their strengths to establish the nation's premier environmental and engineering services consulting firm. This powerhouse organization offers an extensive range of services aimed at revolutionizing the built environment and preserving the natural one. Its diverse expertise encompasses environmental remediation, urban planning, engineering iconic coastal and marine structures, developing sustainable energy sources, and pioneering resource extraction methods. Explore further at www.MWNE.com and True-Environmental.com to discover the full scope of our capabilities.

Matrix New World Engineering, a part of True Environmental and its partner firms, is seeking a Groundwater Modeler to join our team in Phoenix, AZ. The position will be a part-time position for up to 25 hours per week, with flexibility to work in our Phoenix office or remotely. Matrix is an equal opportunity employer.

Our Arizona Water Services group focuses on hydrogeological and environmental consulting with offices in Phoenix and Prescott, and remote staff located in North and South America. The ideal candidate will participate in groundwater flow and contaminant transport modeling and support hydrogeologic investigations for water resources and environmental consulting projects.

As a Groundwater Modeler, you will support the team by assisting with numerical groundwater model development, data analysis, and technical reporting, gaining hands-on experience in groundwater flow modeling.

What You'll Do

Assist in building, calibrating, and running numerical groundwater flow and transport models using the Modular Finite-Difference Flow Model (MODFLOW), Model Transport in 3 Dimensional (MT3D) and Finite Element Subsurface Flow System (FEFLOW) suites of software or similar platforms
Support collection, organization, and quality assurance/quality control (QA/QC) of large hydrogeologic datasets such as water levels, aquifer parameters, pumping rates, etc.
Help prepare model input datasets, grid construction, and boundary condition assignments under senior staff guidance
Assist with pre-processing of model inputs and post-processing/visualization of model outputs using tools such as Groundwater Vistas processing applications and Groundwater Modeling Systems (GMS) or ModelMuse graphical user interfaces and Geographic Information Systems (ArcGIS Pro)
Assist with sensitivity analyses and predictive scenario runs
Support preparation of technical memoranda, model reports, and figures documenting modeling methods and results
Participate in literature review and data acquisition of site geology, hydrogeology, and regulatory framework considerations
Collaborate with project teams on groundwater resources projects
Ensure all work is performed in accordance with project quality assurance and safety protocols

Minimum Requirements

Education: Working on Bachelor’s or Master’s degree in Hydrogeology, Geology, Civil/Environmental Engineering, or a closely related field

Academic Experience: Coursework in groundwater hydrology, hydrogeology, fluid mechanics, or numerical methods
Hydrogeologic Experience: Familiarity with groundwater modeling concepts such as Darcy’s Law and the Theis non-equilibrium equation
Modeling Experience: Basic exposure to modeling software such as Modular Finite-Difference Flow Model (MODFLOW) suites of software, Groundwater Vistas processing applications or other graphical user interfaces through coursework or self-study
Support Software: Proficiency in Microsoft Office Suite; experience with data processing applications such as Python, R, or Matrix Laboratory (MATLAB)

Preferred Requirements

Master’s degree in Hydrogeology, Geology, or Environmental/Civil Engineering
Previous experience with MODFLOW-family of codes or commercial groundwater modeling graphical user interfaces (GUIs) such as Groundwater Modeling Systems (GMS), Groundwater Vistas and ModelMuse
Experience with ArcGIS software for spatial data management and figure preparation
Prior internship or research experience at an environmental consulting firm or regulatory agency
Ability to work effectively both independently and as part of a multidisciplinary project team
Strong attention to detail and organizational skills for managing model files and datasets
Excellent oral and written communication skills

All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, disability or protected veteran status.

We may use artificial intelligence (AI) tools to support parts of the hiring process, such as reviewing applications, analyzing resumes, or assessing responses and identifying potential inconsistencies or verification signals in application materials based on available information. These tools assist our recruitment team but do not replace human judgment. Final hiring decisions are ultimately made by humans. If you would like more information about how your data is processed, please contact us.

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