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Low Level Radio Frequency Engineer 3

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Date: Nov 27, 2018

Location: Oak Ridge, TN, US, 37831

Company: Oak Ridge National Laboratory

Requisition Id 312 

Pay Band Level:  Staff Member 3
Relocation:  Domestic and International Relocation Assistance is available for this position.


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 more than 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: 

The Spallation Neutron Source (SNS) at ORNL is carrying out the Proton Power Upgrade (PPU) project to double the proton beam power on target from 1.4 to 2.8 MW.  The beam energy will be increased by installing seven additional cryomodules containing 28 superconducting niobium cavities, and the beam current will be increased through upgrades to existing systems.


The LLRF Engineer will support operation, maintenance, repairs, and upgrades of the LLRF systems that are utilized for the acceleration and manipulation of charged-particle beams in the SNS accelerator complex and execution of the Proton Power Upgrade.

Major Duties and Responsibilities:

  • Evaluate and improve the design of the LLRF systems to support the Research Accelerator Division’s mission to provide high availability (>90%) neutrons for Neutron Science investigations.
  • Develop new architectures and algorithms for upgrades of the LLRF systems used throughout the accelerator complex.
  • Perform simulations of RF control systems in support of LLRF control system development.
  • Develop and improve hardware description language (HDL) for systems utilizing field programmable gate arrays (FPGA).
  • Develop control interfaces for custom hardware platforms utilizing LabView, C++, and EPICS software.
  • Serve as a LLRF subject matter expert for the LLRF and Operations teams.
  • Provide LLRF support for accelerator operations including occasional call-in and off-normal work hours.
  • Perform failure analysis and study mean time to repair and mean time to failure data on LLRF systems to propose reliability upgrades.
  • Create and maintain documentation and procedures for LLRF equipment and ancillary systems.

Basic Qualifications:

  • B.S. degree in Electrical Engineering
  • 5 or more years of relevant electrical engineering experience
  • Experience in the design of digital feedback control systems
  • Experience in FPGA code development using VHDL or Verilog
  • Demonstrated hands-on laboratory experience, especially with RF and microwave test equipment
  • Highly motivated, self-directed and able to work in a team environment
  • Excellent written and verbal communications skills

Preferred Qualifications:

  • Expertise in control system theory and techniques
  • Expertise in circuit design and printed circuit board layout
  • Expertise in computer programming using languages such as C++ and Labview
  • Experience with analog and RF simulation and modeling tools such as MATLAB, SPICE, and Microwave Office

Work Direction and Interfaces:
* Reports to the LLRF Team Leader.
* Interfaces with Electrical and RF Systems Group members, NScD staff, professional peers from non-ORNL institutions, ORNL business services, vendors and visitors.
*  Represents group activities and interests within ORNL and at professional conferences, workshops, and collaboration meetings.

Authority/Approval Levels:
Provides work direction to technicians, research mechanics, subcontractors, and vendors within guidelines established by the Electrical and RF Systems Group Leader. Initiates procurement of materials and services.


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.   

Relocation:  Moving is stressful and expensive, and 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.

Nearest Major Market: Knoxville