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Power Electronics Engineer

Date: Nov 28, 2021

Location: Oak Ridge, TN, US, 37830

Company: Oak Ridge National Laboratory

Requisition Id 4421 


We are seeking a Power Electronics Engineer for the Electrical Power Conversion Group in the Accelerator Systems Section of the Research Accelerator Division (RAD). Selection will be based on qualifications, relevant experience, skills, and education. The Research Accelerator Division’s mission is to safely and reliably operate the SNS Accelerator and Target and to execute impactful Accelerator R&D focused on SNS improvements and strategic opportunities, all in support of delivering neutrons for impactful scientific discovery.

The Accelerator Systems Section is responsible for safe, reliable and cost effective operation, maintenance and improvement of the SNS Accelerator systems including Front End, normal conducting RF structures, superconducting RF (SRF) structures, high power RF, low-level RF, high voltage converter modulators, DC and pulsed power systems, Central Helium Liquifier (CHL), Cryogenic Moderator System (CMS), and focused R&D in advanced ion source, SRF and advances lasers techniques.

The Electrical Power Conversion Group is leading efforts for maintenance, operational support, system engineering,  improvement and upgrade of all SNS high voltage converter modulators (HVCM), high speed H- beam choppers, pulse power systems for beam injection and extraction in the ring, and dc power supplies for magnets which provide beam shaping and positioning; R&Ds for HVCM and pulsed power systems.


The Power Electronics Engineer supports operation, maintenance, repairs and upgrades of HVCM Systems, Magnet Power Supplies, Accelerator Beam Kickers, and High Voltage Beam Chopper systems in the SNS accelerator complex. This requires project planning, specification writing, system design and validation testing.  The role reports to the Electrical Power Conversion Group Leader.  Interfaces include Electrical Power Conversion Group members, ORNL and SNS staff, professional peers, and collaborators from non-ORNL institutions, ORNL business services, vendors, and visitors. 

Major Duties and Responsibilities:

  • Evaluate existing modulator, magnet, power supply, kicker, and chopper systems to enhance performance, address limitations, improve availability and address obsolescence issues.
  • Specify, develop, and procure subsystems and components.
  • Provide accelerator operations support for the SNS facilities operating 365/24/7, including occasional after hours call-in to achieve neutron production with >90% availability.
  • Plan, manage, and execute maintenance and upgrade work.
  • Develop design, installation, training, testing, maintenance, and procurement documentation and procedures.
  • Present your work at conferences, workshops, collaboration meetings and sponsor reviews.  Some travel may be required.
  • Ensure compliance with environmental, safety, health, and quality program requirements.
  • You will be expected to be willing to learn new skills and to train others.
  • As a member of the ORNL scientific community, you will be expected to commit to ORNL's Research Code of Conduct.  Our full code of conduct, and a statement by the Lab Director's office can be found here:

Basic Qualifications:

  • BS in Electrical Engineering or related field with 2 or more years of relevant work experience.
  • Solid understanding of analog and digital circuits and basic electric circuit theory.
  • Understanding of power electronics, electromagnetic fields, very high-power semiconductor devices and pulsed power systems exceeding 50 kV
  • Ability to quickly grasp complex technical problems
  • Experience designing and maintaining high power electronics and magnetics
  • Expertise in troubleshooting and use of standard laboratory test equipment
  • Ability to work with a team of engineers and technicians in a project environment
  • Experience working with electrical safety principles in a setting that includes severe electrical hazards
  • Must be highly motivated, self-directed, and able to work in a team environment
  • Excellent written and verbal communications skills
  • Experience creating engineering drawings, specifications, procedures, reports, statements of work, journal and conference papers, and plans.
  • Experience with circuit simulation, mechanical CAD and printed circuit board design software and tools

Preferred Qualifications:

  • Knowledge of AC power distribution concepts to medium voltage levels
  • Working knowledge of the National Electric Code, NFPA-70E and NFPA-70B
  • Knowledge of high-power magnet power supplies and pulsed power systems used in accelerators
  • Knowledge of Failure Mode Effects Analysis (FMEA) and methods to effectively implement
  • Experience with finite element electromagnetic analysis software
  • Experience programming FPGAs, PLCs and using LabView software.
  • Operational experience with a large accelerator facility

About Neutron Sciences Directorate:
The Neutron Sciences Directorate (NScD) at Oak Ridge National Laboratory (ORNL) operates the High Flux Isotope Reactor (HFIR), the United States' highest flux reactor based neutron source, and the Spallation Neutron Source (SNS), the world's most intense pulsed accelerator based neutron source. Together these facilities operate 30 instruments for neutron scattering research, each year carrying out in excess of 1,000 experiments in the physical, chemical, materials, biological and medical sciences. HFIR also provides unique facilities for isotope production and neutron irradiation. To learn more about Neutron Sciences at ORNL go to: 

Benefits at ORNL:  UT-Battelle offers a quality benefits package, including a matching 401(k), contributory pension plan, paid vacation, and medical/dental plan options. Onsite amenities include a credit union, medical clinic, cafeteria, coffee stands, and fitness facilities.  

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.



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