Groundwater Modeler

Navarro Research and Engineering, Inc. is recruiting a Ground Water Modeler, in Las Vegas, NV.

Navarro Research & Engineering is an award-winning federal contractor dedicated to partnering with clients to advance clean energy and deliver effective solutions for complex challenges in the nuclear and environmental fields. Joining Navarro means being a part of an exceptional team committed to quality and safety while also looking for innovative strategies to create value for the client’s success. Headquartered in Oak Ridge, Tennessee, Navarro has active programs in place across the nation for DOE/NNSA, NASA, and the Department of Defense.

The Groundwater Modeler will utilize models for calibration, optimization, and probabilistic forecasting of groundwater flow and radionuclide transport from underground nuclear test locations on the Nevada National Security Site. The aquifers simulated are primarily vitric and welded tuffs with interspersed lava flows separated by bedded air fall tuff confining units. The area is structurally complex with numerous faults and calderas. The modeler is expected to develop written documentation of modeling results, presentation materials, graphics, and data packages.

General Responsibilities and Knowledge Skills:

• Knowledge of and experience with calibration and optimization of models.
• Experience with evaluation of model sensitivity and uncertainty.
• Knowledge of flow and transport in porous and fractured rock, dispersion, matrix diffusion, radioactive decay, sorption processes, and colloid transport.
• Knowledge of porous media and equivalent porous media approaches to simulate flow and transport in fractured rock.
• Knowledge of particle tracking methods in flow and transport.
• Experience running on multi-processor computing resources; stand alone or cloud based.
• Knowledge and experience interpreting aquifer test data using analytical and numerical approaches.

Specific Responsibilities and Knowledge/Skills

• The ideal candidate will have experience in a scientific programming language such as Python, C, Visual Basic, or Fortran and be comfortable navigating and manipulating data in a Linux or Windows type environment.
• The modeler should have a basic familiarity with Geographic Information System applications and can use GIS files as model inputs.
• Experience using a variety of simulation codes including MODFLOW6, PEST, and GOLDSIM.
• Familiarity with geologic modeling software such as EarthVision is desirable.
• Experience developing models to support regulatory decision making.

Requirements

• Bachelor’s or higher degree in a science or engineering discipline.
• Minimum 5 years’ experience in the application of groundwater models to complex problems

Working Conditions:

• This position will initially be based in Las Vegas at the project office. This is an office environment where the work is sedentary.
• This position may transition to remote work after a suitable orientation and training period.

Due to the nature of the government contract requirements and/or clearances requirements, US citizenship is required.

Navarro is an equal-opportunity employer. All qualified applicants will receive consideration for employment without regard to race, religion, color, national origin, gender, age, sexual orientation, gender identity, status as a protected veteran, or status as a qualified individual with a disability.

EEO Employer/Vet/Disabled

Benefits

• Health Care Plan (Medical, Dental & Vision)
• Retirement Plan (401k, IRA)
• Life Insurance (Basic, Voluntary & AD&D)
• Paid Time Off (Vacation, Sick & Public Holidays)
• Short Term & Long Term Disability