Senior HPC Network Engineer (Hybrid Eligible)

Date: Apr 17, 2024

Location: Oak Ridge, TN, US, 37830

Company: Oak Ridge National Laboratory

Requisition Id 12717 



The National Center for Computational Sciences (NCCS) in the Computing and Computational Sciences Directorate at Oak Ridge National Laboratory is seeking a highly qualified individual to play a key role in improving security, performance, and reliability of the NCCS computing infrastructure which supports multiple highly ranked Top500 Supercomputers, including the world’s first exaflop system, Frontier.


We are looking for a self-starter with the ability to work within the parameters of a project to achieve the vital goals. You will be a part of the HPC Networking group within the Systems section to support all activities of the supercomputer center.


As a U.S. Department of Energy (DOE) Office of Science national laboratory, ORNL has an outstanding 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.


Job Duties and Responsibilities:

  • Installing, configuring, and maintaining network system software

  • Working with the team to define and implement best practices and standards within the organization

  • Diagnosing complex network operational problems quickly and efficiently

  • Work with users to transfer data to and from remote sites

  • Maintaining and improving network performance and health metric collection and monitoring

  • Analyze the performance and health metrics to proactively avoid future problems, fix current problems, and aid in capacity planning

  • Ensuring that appropriate security measures are built into the network, that these security measures meet the performance needs of the center, and that they are maintained in future modifications

  • Coordinate with cyber security staff to provide appropriate data for intrusion detection

  • Participate in on-call rotation, responding to critical incidents 24 hours, 7-day support and off hour maintenance windows

  • Documenting network administration procedures for routine and complex tasks


Basic Qualifications:

  • Bachelor’s Degree in computer science or closely related field and at least 8 years of experience in network engineering and administration. An equivalent combination of education and networking experience will be considered.


Preferred Qualifications:

  • Advanced knowledge of networking fundamentals, operating system fundamentals, and their interaction with each other.

  • Advanced knowledge of the development, implementation, and review of technical network and security requirements.

  • An in-depth knowledge of standards governing both TCP/IP and Ethernet.

  • Working knowledge of packet capture and analysis tools

  • In-depth knowledge of the systems of the network, their function, and the risks that they present.

  • Familiarity and experience with basic scripting—including Perl, Expect, Python.

  • Experience with and knowledge of SNMP, Netflow, sFlow, syslog.

  • Ability to plan, coordinate, prioritize tasks, and complete assigned projects with minimal direction.

  • Experience designing, configuring and troubleshooting enterprise-class network switches, routers, and firewalls.

  • Experience implementing network-level security technologies and following security best–practices.

  • Good interpersonal and communication skills.

  • Ability to work as a standout colleague.

  • Prior experience with test utilities and other methods for simulating workloads in a test environment.

  • A proven foundation in high-performance computing, experience with large supercomputers, and knowledge of applications that run on them.


Special Requirement:

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.



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.


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.


Other benefits include: 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: 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

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