Senior Mechanical Process Technician

We're seeking a hands‑on technician experienced in both Superconducting Radio Frequency (SRF) systems and cryogenics who will focus on the operation and maintenance of large‑scale helium liquefaction systems and cryomodules within the accelerator complex. This position resides in the Superconducting Linac Systems Group in the Accelerator Systems Section, Research Accelerator Division, Neutron Sciences Directorate at Oak Ridge National Laboratory (ORNL). Major Duties/Responsibilities Serve as a senior Central Helium Liquefier Specialist responsible for operation, troubleshooting, and optimization of large‑scale cryogenic helium process systems and rotating equipment. Lead recovered helium purification and liquid helium Dewar filling operations based on supply chain availability. Perform and lead complex cryomodule repair, maintenance, refurbishment, testing, and commissioning activities with minimal supervision. Support cryogenic and Superconducting Radio Frequency (SRF) research and development efforts, including assembly, certification, and operation of SNS linac cryogenic components and systems. Respond independently to alarms, abnormal events, and operational issues, providing technical leadership during recovery and troubleshooting activities. Mentor and train technical staff, develop procedures and documentation, and provide technical input during design reviews and Failure Modes and Effects Analysis (FMEA) activities. Set up, operate, and troubleshoot process, test, and measurement equipment; collect and analyze system performance data to verify operational integrity and acceptance criteria. Provide work direction and technical guidance to trades, crafts, contractors, and junior personnel supporting fabrication, assembly, installation, and commissioning activities. Ensure compliance with Environment, Safety, and Health (ESH) and quality requirements while supporting continuous improvement initiatives for system reliability and operational performance. Primarily work day shift with occasional alternate and some weekend shifts. Deliver ORNL’s mission by aligning behaviors, priorities, and interactions with our core values of Impact, Integrity, Teamwork, Safety, and Service. Promote equal opportunity by fostering a respectful workplace – in how we treat one another, work together, and measure success. Basic Qualifications An AS degree in mechanical technology or related field with at least 7 years of relevant experience (a high school diploma with a minimum of 9 years of relevant experience will also be considered) Experience in operating large‑scale process systems Must be willing to learn new skills and train others Preferred Qualifications Experience working in a clean production environment, using mechanical and electronic test and measurement equipment Experience with high‑vacuum systems and cleanroom techniques Experience in operating and maintaining rotating equipment Special Requirements Work involves various physical requirements and working conditions. As such, a pre‑hire physical will be required after offer. Visa sponsorship is not available for this position. Security, Credentialing, and Eligibility Requirements For employment at Oak Ridge National Laboratory (ORNL), a Real ID compliant form of identification will be required. Additionally, ORNL is subject to Department of Energy (DOE) access restrictions. All employees must also be able to obtain and maintain a federal Personal Identity Verification (PIV) card as mandated by Homeland Security Presidential Directive 12 (HSPD‑12) and Department of Energy (DOE) Order 473.1A, which requires a favorable post‑employment background investigation. To obtain this credential, new employees must successfully complete and pass a Federal Tier 1 background check investigation. This investigation includes a declaration of illegal drug activities, including use, supply, possession, or manufacture within the last year. This includes marijuana and cannabis derivatives, which are still considered illegal under federal law, regardless of state laws. For foreign national candidates: If you have not resided in the U.S. for three consecutive years, you are not eligible for the PIV credential and instead will need to obtain a favorable Local Site Specific Only (LSSO) risk determination to maintain employment. Once you meet the three‑year residency requirement, you will be required to obtain a PIV credential to maintain employment. Benefits at ORNL We offer competitive pay and benefits programs to attract and retain hardworking 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, and Employee Discounts. 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. #J-18808-Ljbffr Oak Ridge National Laboratory