HPC Engineer - System Acceptance & User Environment (Hybrid Eligible)

Date: Jan 27, 2024

Location: Oak Ridge, TN, US, 37830

Company: Oak Ridge National Laboratory

Requisition Id 11305 



As a U.S. Department of Energy (DOE) Office of Science national laboratory, Oak Ridge National Lab has an extraordinary 80-year history of solving the nation’s biggest problems. We have a dedicated and creative staff of over 6,000 people! Our vision for diversity, equity, inclusion, and accessibility (DEIA) is to cultivate an environment and practices that foster diversity in ideas and in the people across the organization, as well as to ensure ORNL is recognized as a workplace of choice. These elements are essential for enabling the execution of ORNL’s broader mission to accelerate scientific discoveries and their translation into energy, environment, and security solutions for the nation.

The Organization:

The National Center for Computational Sciences (NCCS) provides pioneering computational and data science infrastructure for technical and scientific professionals to accelerate scientific discovery and engineering advances across a broad range of subject areas. As an important part of the broader High-Performance Computing (HPC) infrastructure, the division also hosts the Oak Ridge Leadership Computing Facility (OLCF), a Department of Energy Office of Science User Facility.

The Team:

The System Acceptance and User Environment Group is within the Operations Section of the NCCS and ensures the functionality, performance, and usability of new NCCS systems through activities such as test development, acceptance, software installation, documentation, and early user support for all NCCS pre-production systems.

Major Duties/Responsibilities:

The role comprises the following focus:

  • Take technical ownership of user reported problems and provide hands-on support for scientific applications and libraries and users of high performance computing systems and clusters.
  • Compile and debug large science and engineering applications.
  • Identify and resolve system-level bugs in conjunction with other technical staff.
  • Work with vendors to resolve issues and implement changes as necessary.
  • Install third-party software applications and tools and provide documentation for usage.
  • Develop and implement system tests to ensure newly deployed systems can support user workloads.
  • Proactively ensure that users have up-to-date information about the system, including any changes and their impact on the users. HPC User Support staff are very involved in researching and developing documentation and reference material during system early-use and upgrade phases, as well as maintaining them throughout system operation.
  • Participate in the development, maintenance, and delivery of training and outreach materials to users.
  • Respond to general administrative questions (e.g., system status, requests for accessor special accommodation).
  • Implement special projects as requested (e.g., metrics, cyber security, policy discussions, automated monitoring).
  • Deliver ORNL’s mission by aligning behaviors, priorities, and interactions with our core values of Impact, Integrity, Teamwork, Safety, and Service. Promote diversity, equity, inclusion, and accessibility by fostering a respectful workplace – in how we treat one another, work together, and measure success.

Basic Qualifications:

A minimum of a bachelor’s degree and 5+ years of related experience, an MS and 4+ years of related experience or a Ph.D. Degree area should be in Computer Science or a related field.

Experience working technologies including more than one of the following:

  • Fortran
  • C
  • C++
  • Perl
  • Python
  • Shell scripting (e.g., bash, ksh) in a Linux or Unix environment

In addition, prior experience working with parallel programming technologies including at least one of the following:

  • MPI
  • OpenMP
  • OpenACC
  • CUDA
  • HIP
  • Kokkos
  • RAJA

Preferred Qualifications:

  • Experience building and installing scientific software and other 3rd party software applications on HPC systems
  • Experience with HPC schedulers and resource managers
  • Experience implementing scientific software on HPC systems
  • Experience developing and completing tests on HPC systems
  • Experience developing scientific software on GPU-based HPC systems
  • Experience with container technologies (e.g., singularity, docker)
  • Experience applying machine learning frameworks on HPC systems
  • Experience writing user documentation
  • Experience developing and delivering training for users
  • Strong technical and analytical skills
  • Strong verbal and written communication skills
  • Maintains the highest level of professionalism at all times when interacting with internal and external customers
  • Demonstrates a high-energy, positive attitude and commitment to quality customer service
  • Contributes to a positive team environment within the center by demonstrating a strong work ethic, effectively communicating with others, and proactively anticipating center and user needs
  • Experience coordinating and running support teams
  • Understanding of the requirements of a DOE, DoD, and/or NSF HPC center

Benefits at ORNL:


ORNL offers competitive pay and benefits programs to attract and retain talented people. The laboratory offers many employee benefits, including medical and retirement plans and flexible work hours, to help you and your family live happy and healthy. Employee amenities such as on-site fitness, banking, and cafeteria facilities are also provided for 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.

In addition, we offer a flexible work environment that supports both the organization and the employee. A hybrid/onsite working arrangement may be available with this position.


If you have difficulty using the online application system or need an accommodation to apply due to a disability, please email: ORNLRecruiting@ornl.gov or call 1.866.963.9545.




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 ORNLRecruiting@ornl.gov.

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.

Nearest Major Market: Knoxville