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# Data Scientist 3

- **Company:** Pacific Northwest National Laboratory
- **Location:** Richmond, VA, United States
- **Experience:** Experienced
- **Salary:** $140,200.0
- **Contract:** Temporary contract
- **Skills:** Continuous Integration, Data Visualization, Fortran (Programming Language), Python (Programming Language), Object-Oriented Software Development, Simulation Software, Software Engineering, Matplotlib, Software Version Control
- **Published:** October 30, 2026
- **Apply:** https://dejobs.org/x/x/BDDB3043B796490D9D5529AC12F833F5/job/

## About the Role

* BS/BA and 5+ years of relevant experience -OR-
 * MS/MA and 3+ years of relevant experience -OR-
 * PhD with 1+ year of relevant experience
 * Experience with subsurface fate and transport / reaction transport codes (e.g. STOMP, PFLOTRAN, CRUNCHFLOW).

Preferred Qualifications:

 * Experience developing subsurface multiphase flow and reactive transport simulation codes.
 * Experience developing object oriented simulation software using modern Fortran.
 * Experience modeling carbon sequestration, enhanced geothermal systems, gas hydrates, andcontaminant fate and transport.
 * Experience developing the PFLOTRAN simulator.
 * Experience developing software with the PETSc library.
 * Experience developing simulation software for high performance computers.
 * Proficiency with modern Fortran and Python.
 * Experience with analysis and visualization tools (e.g., Matplotlib, Paraview).
 * Experience with open source software development, distributed version control, and continuous integration.
 * Candidates should have a demonstrated commitment to data quality and accuracy, strong written and oral communication skills as evidenced by scientific publications and conference presentations, and be able to work independently and in a team setting.
 * Candidates should have experience with business development, such as proposal development and client engagement.
 * Candidates should have experience mentoring students, interns, or junior staff.
 * Candidates should have experience leading small project tasks.

Hazardous Working Conditions/Environment

Not Applicable

Additional Information

This position requires the ability to obtain and maintain a federal security clearance.

A security clearance background investigation includes review of your employment, education, financial, and criminal history, as well as interviews with you and your personal references, neighbors, and co-workers to determine trustworthiness, reliability, and loyalty to the United States. The investigation also examines your foreign connections, drug and alcohol use, foreign influence, and overall conduct.

Requirements:

 * U.S. Citizenship
 * Background Investigation: Applicants selected will be subject to a Federal background investigation and must meet eligibility requirements for access to classified matter in accordance with 10 CFR 710, Appendix B.
 * Drug Testing: All Security Clearance positions are Testing Designated Positions, which means that the applicant selected for hire is subject to pre-employment drug testing, and post-employment random drug testing. In addition, applicants must be able to demonstrate non-use of illegal drugs, including marijuana, for the 12 consecutive months preceding completion of the requisite Questionnaire for National Security Positions (QNSP).

Note: Applicants will be considered ineligible for security clearance processing by the U.S. Department of Energy if non-use of illegal drugs, including marijuana, for 12 months cannot be demonstrated.

## Description

PNNL's Environmental Subsurface Science Group is seeking a mid-level scientist or engineer with expertise developing PFLOTRAN to lead and contribute to projects modeling subsurface reactive multiphase flow for problem scenarios including geologic carbon storage, geothermal energy production, and environmental remediation. The position requires the ability to lead and support development of simulation capabilities and application of advanced simulation tools to diverse problems. The candidate will lead and work collaboratively with teams in multiple disciplines including geophysics, geochemistry, and environmental engineering.