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Flow Network Modeling and Simulation Engineer, R&D Associate Staff

Date: Sep 28, 2022

Location: Oak Ridge, TN, US, 37830

Company: Oak Ridge National Laboratory

Requisition Id 7128 

Level: RP02




The Multiphysics Modeling and Flows group is seeking skilled engineers to aide in the design and performance modeling of gas centrifuge cascades.  The successful candidate will work with subject matter experts to develop and validate cascade modeling capabilities that include variations in centrifuge performance, pressure losses in the headers, and flow distribution over multiple parallel flow paths.  Both steady-state and transient flow effects are of interest.


Major Duties/Responsibilities:


  • Interact with subject matter experts to develop software tools for cascade modeling and validate modeling tools against experimental data.
  • Interact with sponsors to define, execute, and report on relevant project elements.
  • Present non-sensitive research in professional journals and conferences.
  • Develop proposals and work statements for funding, with ability to manage work scope and deliverables to sponsors


Basic  Qualifications:


  • PhD in mechanical engineering, chemical engineering or related field and relevant postdoctoral experience.
  • R&D experience in the application of multiphysics modeling tools to integrated systems.
  • Demonstrated experience with usage and/or code development in a variety of programming langagues (FORTRAN, Python, C++, MatLab, Julia) and their application to scientific computing (e.g. automation, pre/post processing, data analysis, file I/O, parallel computing).  FORTRAN experience is particularly desirable.
  • Strong oral and written communication skills, ability to work in a team environment.


Preferred Qualifications:


  • 2+ years of relevant professional R&D experience outside of Ph.D.
  • Experience with one or more of the following areas: complex fluid flow networks, chemical process flow analysis, compressible fluid flow, convective heat transfer, petrochemical processing.
  • Experience combining FORTRAN coding with C++
  • Experience with Department of Energy developed multiphysics simulation tools, such as Sierra
  • Demonstrated experience with the verification and/or validation of complex computational models and simulation results
  • Experience working in  a modern code development project
  • An active DOE Q clearance


Special Requirements:


  • This position requires access to technology that is subject to export control requirements and to sensitive projects. Successful candidates must be qualified for such access without an export control license.
  • It is required of this position the ability to obtain and maintain a clearance from the Department of Energy. As such, this position is a Workplace Substance Abuse program (WSAP) testing designed position which requires passing a pre-placement drug test and participation in an ongoing random drug testing program in which employees are subject to being randomly selected for testing. The occupant of this position will also be subject to an ongoing requirement to report to ORNL any drug-related arrest or conviction or receipt of a positive drug test result.


Benefits at ORNL:  


UT Battelle offers an exceptional benefits package to include matching 401K, Pension Plan, Paid Vacation and Medical / Dental plan. Onsite amenities include Credit Union, Medical Clinic and free Fitness facilities.   

For more information about our benefits, working here, and living here, visit the “About” tab at




UT Battelle offers a wide range of relocation benefits for individuals and families to make it easier to come and work here. If you are invited to interview, please ask your Recruiter about relocating with ORNL. 



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.

If you have trouble applying for a position, please email

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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