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Proficiency in scripting and automation with PowerShell and/or Python, and comfort with the Azure CLI
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Azure DevOps Engineer
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Proficiency in scripting and automation with PowerShell and/or Python, and comfort with the Azure CLI
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AI Solutions Architect
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Irvine, CA
Proficiency in Python and modern AI frameworks
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Laboratory Technician
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Oak Ridge National Laboratory

Computational Fluid Dynamics Modeler (Early Career)

Oak Ridge, TN, United States

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Job details

Apply by: Jan 5, 2027
Posting language: English
Posted: Nov 2, 2026

Original job description

Requisition Id 17382

Overview:

We are seeking a Computational Fluid Dynamics (CFD) modeler to apply modeling tools to simulate the complex behavior of fluids at all scales to support isotope enrichment. A successful candidate will collaborate with computer scientists and experimental facilities to develop verified models focused on enrichment technologies. This position resides in the Gas Testing & Simulation Group in the Separative Performance Engineering & Testing Section, Centrifuge Enrichment Technology Division, Isotope Science and Enrichment Directorate, at Oak Ridge National Laboratory (ORNL). This group leads the application of machine and cascade theory to develop, simulate, execute, and interpret testing evolutions for discovery, performance evaluation, and optimization of enrichment systems. As part of our team, you will provide research and development (R&D) support to strategically advance science and technology of prototype enrichment devices for processing both uranium-bearing and stable isotope process gases.

The Oak Ridge National Laboratory (ORNL) is one of the nation’s largest multi-program science and technology laboratories within the U.S. Department of Energy (DOE). The Enrichment Science and Engineering Division (ESED) at ORNL is tasked with advancing enrichment technologies and exploring stable isotope production and application. The division leverages an elite staff of scientists and engineers with the world-leading capabilities of ORNL to deliver groundbreaking advancements with a variety of applications, from national security to life-saving medical treatments.

Major Duties/Responsibilities:

Apply initial modeling efforts as they pertain to enrichment technologies.
Work closely with testing staff & project management to develop targeted model applications
Plan and execute modeling studies.
Produce and present thorough, scientific reports describing methods, materials, and conclusions based on modeling analyses.
Develop and write proposals for innovative research and funding.
Deliver ORNL’s mission by aligning behaviors, priorities, and interactions with our core values of Impact, Integrity, Teamwork, Safety, and Service. Promote equal opportunity by fostering a respectful workplace – in how we treat one another, work together, and measure success.

Basic Qualifications:

BS degree in engineering, physics, computer science, or closely related field.
Experience in applications of computational fluid dynamic models for decision making,
Excellent written and oral communication skills.
Demonstrated experience working in cross-disciplined teams.
The ability to clearly communicate, both verbally and in writing, to sponsoring agencies, other engineers and researchers, technicians, and craftsmen.
The ability to work flexible hours and travel when required.
Candidate must be able to obtain and maintain a DOE Q clearance which requires US Citizenship.

Preferred Qualifications:

MS degree in engineering, physics, computer science, or closely related field
Strong computational skills with modeling and simulation experience using High-Performance Computing environments and experience with Linux environments
Experience with MATLAB, Python, or related development packages for processing of model results
Familiarity with Finite Element Methods.
Motivated self-starter with the ability to work independently and to participate creatively in collaborative teams across the laboratory.
Ability to function well in a fast-paced research environment, set priorities to accomplish multiple tasks within deadlines, and adapt to ever changing needs.
Active DOE Q Clearance

Special Requirements:

Visa sponsorship is not available for this position.
This position requires the ability to obtain and maintain a clearance from the Department of Energy. As such, this position is a Workplace Substance Abuse (WSAP) testing designated position. WSAP positions require passing a pre-placement drug test and participation in an ongoing random drug testing program.

Relocation: Moving can be overwhelming and expensive. UT-Battelle offers a generous relocation package to ease the transition process. Domestic and international relocation assistance is available for certain positions. If invited to interview, be sure to ask your Recruiter (Talent Acquisition Partner) for details.

About ORNL:

As a U.S. Department of Energy (DOE) Office of Science national laboratory, ORNL has an impressive 80-year legacy of addressing the nation’s most pressing challenges. Our team is made up of over 7,000 dedicated and innovative individuals! Our goal is to create an environment where a variety of perspectives and backgrounds are valued, ensuring ORNL is known as a top choice for employment. These principles are essential for supporting our broader mission to drive scientific breakthroughs and translate them into solutions for energy, environmental, and security challenges facing the nation.

ORNL offers competitive pay and benefits programs to attract and retain individuals who demonstrate exceptional work behaviors. The laboratory provides a range of employee benefits, including medical and retirement plans and flexible work hours, to support the well-being of you and your family. Employee amenities such as on-site fitness, banking, and cafeteria facilities are also available for added convenience.

Other benefits include the following: Prescription Drug Plan, Dental Plan, Vision Plan, 401(k) Retirement Plan, Contributory Pension Plan, Life Insurance, Disability Benefits, Generous Vacation and Holidays, Parental Leave, Legal Insurance with Identity Theft Protection, Employee Assistance Plan, Flexible Spending Accounts, Health Savings Accounts, Wellness Programs, Educational Assistance, Relocation Assistance, and Employee Discounts.

If you have difficulty using the online application system or need an accommodation to apply due to a disability, please email: ORNLRecruiting@ornl.gov.

This position will remain open for a minimum of 5 days after which it will close when a qualified candidate is identified and/or hired.

We accept Word (.doc, .docx), Adobe (unsecured .pdf), Rich Text Format (.rtf), and HTML (.htm, .html) up to 5MB in size. Resumes from third party vendors will not be accepted; these resumes will be deleted and the candidates submitted will not be considered for employment.

ORNL is an equal opportunity employer. All qualified applicants, including individuals with disabilities and protected veterans, are encouraged to apply. UT-Battelle is an E-Verify employer.

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