Overview

The Integrated Discovery Sciences Directorate (IDSD) leads fundamental research across biology, chemistry, earth and environmental sciences, materials science, advanced computing, artificial intelligence, quantum information science, mathematics, autonomy, and DOE national user facilities. Our vision is to accelerate scientific discovery by observing, understanding, simulating, predicting, and controlling dynamic biotic-abiotic processes and interactions within complex biological, chemical, material, and Earth systems. We intentionally connect disciplines to advance fundamental discovery science, develop transformative scientific capabilities, and address the nation's most important challenges in energy, environmental resilience, biotechnology, advanced manufacturing, health, and national security.

Responsibilities

The Atmospheric, Climate, and Earth Sciences Division is seeking a Computer Scientist who:

• Designs and develops computers and computational systems, including both hardware and software, with a focus on architectures, languages, and applications.
• Researches and advances theories of computation, including the design and efficiency of algorithms and how humans interact with computers and computing processes.
• Develops work products including new theories and technical advances in the field.
• Lead software engineering and development efforts for the Energy Research and Forecasting (ERF) model, a GPU-enabled, compressible atmospheric flow solver built on the AMReX adaptive mesh refinement framework.
• Design, develop, and maintain performant, portable numerical algorithms for atmospheric dynamical cores, ensuring correctness and efficiency across CPU and GPU architectures.
• Lead GPU hardware portability efforts, optimizing ERF for heterogeneous DOE exascale and pre-exascale systems (e.g., NVIDIA, AMD, and Intel GPU platforms).
• Oversee deployment, build systems, continuous integration, and performance validation of AMReX-based models on DOE high-performance computing (HPC) systems (e.g., Frontier, Perlmutter, Aurora, and PNNL institutional computing resources).
• Collaborate with the multi-institution ERF development team to extend model capabilities, including terrain representation, urban simulation, land surface modeling, atmospheric chemistry, aerosols, and cloud microphysics.
• Mentor junior software engineers and postdoctoral researchers contributing to ERF and related AMReX-based codes; contribute to code review, documentation, and open-source software practices.
• Author and co-author technical publications, scientific publications, software releases and present ERF capabilities at DOE program reviews and scientific conferences.

Qualifications

Minimum Qualifications:

• 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

Preferred Qualifications:

• PhD in Computational Science, Engineering, Applied Mathematics, Atmospheric Science, or closely related field.
• Demonstrated experience in scientific software development.
• Demonstrated hands-on experience and leadership in developing production-quality scientific/engineering software in C++ for high-performance computing environments.
• Proven experience porting and optimizing scientific codes for GPU architectures (CUDA, HIP, SYCL, or portable abstraction layers).
• Experience deploying and validating large-scale simulation codes on DOE HPC systems.
• Experience with the AMReXframework or comparable block-structured adaptive mesh refinement (AMR) libraries.
• Experience developing, extending, or deploying the ERF model.
• Strong software engineering practices: version control, testing/CI, code review, and technical documentation.
• Excellent written and verbal communication skills, with a record of technical publications and/or open-source software contributions.
• Expertise in compressible dynamical core numerics for atmospheric or geophysical flow modeling.
• Track record of peer-reviewed publications on atmospheric models.
• Experience mentoring students/postdocs and contributing to multi-institution DOE software projects.

Hazardous Working Conditions/Environment

Not Applicable

Testing Designated Position

This is not a Testing Designated Position (TDP).

Rockstar Rewards

Employees and their families are offered medical insurance, dental insurance, vision insurance, robust telehealth care options, several mental health benefits, free wellness coaching, health savings account, flexible spending accounts, basic life insurance, disability insurance*, employee assistance program, business travel insurance, tuition assistance, relocation, backup childcare, legal benefits, supplemental parental bonding leave, surrogacy and adoption assistance, and fertility support. Employees are automatically enrolled in our company-funded pension plan* and may enroll in our 401 (k) savings plan with company match*. Employees may accrue up to 120 vacation hours per year and may receive ten paid holidays per year.

* Research Associates excluded.

**All benefits are dependent upon eligibility.

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Notice to Applicants

PNNL lists the full pay range for the position in the job posting. Starting pay is calculated from the minimum of the pay range and actual placement in the range is determined based on an individual's relevant job-related skills, qualifications, and experience. This approach is applicable to all positions, with the exception of positions governed by collective bargaining agreements and certain limited-term positions which have specific pay rules.

As part of our commitment to fair compensation practices, we do not ask for or consider current or past salaries in making compensation offers at hire. Instead, our compensation offers are determined by the specific requirements of the position, prevailing market trends, applicable collective bargaining agreements, pay equity for the position type, and individual qualifications and skills relevant to the performance of the position.

Minimum Salary

USD $122,100.00/Yr.
Maximum Salary

USD $193,000.00/Yr.