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Mechanical Lead, HFIR Systems Engineering, Design, and Fabrication Group

Date: May 13, 2022

Location: Oak Ridge, TN, US, 37830

Company: Oak Ridge National Laboratory

Requisition Id 8262 


The Research Reactors Division at the Oak Ridge National Laboratory (ORNL) seeks to hire a Group Leader for the Mechanical Engineering Group in the High Flux Isotope Reactor (HFIR) Systems Engineering, Design, and Fabrication Section.


The Systems Engineering, Design, and Fabrication Section within the Research Reactors Division is responsible for the High Flux Isotope Reactor (HFIR) configuration management program.  The mechanical engineering group provides technical support to operations and maintenance, and performs system analysis.  In this role you will function as a front-line supervisor for engineers who perform design engineering in support of modifications to mechanical systems at HFIR.  You will also supervise engineers who conduct technical support for maintenance activities and conduct performance analysis of reactor systems.  The Lead also performs engineering roles for assigned systems.  This position will function as a cognizant system engineer for the assigned HFIR plant systems in the HFIR System Engineering Program in accordance with DOE O 420.1 for the hazard category 1 nuclear facility and shall be qualified as a HFIR System Engineer in the RRD Training Program. 


Major Duties and Responsibilities: 


  • Plan and manage engineering activities for assigned areas of responsibility.
  • Provides leadership, direction, and support to engineering staff including work distribution and prioritization.
  • Performs mid-year and annual personnel assessment, evaluation, and development for engineering staff.
  • Make recommendations to HFIR management regarding technical issues.
  • Provide formal and informal plant status updates to HFIR management.
  • Provide input to HFIR management for planning and implantation of fiscal year budget and schedule. 
  • Provide input to HFIR 3-Year planning activities and updates.



  • Prepares engineering designs for new installations and for replacement and upgrade of reactor structures, systems, and components (SSCs).
  • Performs calculations and interpretations of industry code to support design development.
  • Applies relevant codes and standards, such as DOE Orders, ASME, AWS, ANSI (including Nuclear Standards), etc.
  • Task leads field installation and testing of engineering design changes.
  • Provides project management for installation of mechanical design changes.
  • Review design specifications to define and determine acceptance criteria for material upgrades.
  • Prepares material specifications, initiates, and provides technical support in procurement of nuclear safety-related materials.
  • Implements modifications in accordance with RRD’s nuclear configuration control processes.
  • Prepares and maintains as-built documentation for assigned HFIR SSCs, including engineering drawings, specifications, system descriptions, relevant databases, and labeling.



  • Troubleshoots and analyzes system and component failures and develops corrective actions.
  • Provides written work package directions to perform and document work.
  • Provides field work technical direction to craft supervisors and craft.
  • Develops and implements preventive maintenance work instructions.



  • Performs operability or equipment degradation assessments to determine equipment impact on HFIR operation.
  • Assists in the investigation of reportable occurrences or operating events and in the preparation of associated reports and root cause determinations.



  • Analyzes and trends results of preventive and predictive maintenance data.
  • Analyzes equipment performance history.
  • Ensures compliance with environment, safety, health, and quality program requirements.
  • Performs overall systems health evaluation in accordance with RRD’s Systems Engineering and Reliability Programs, which involves the following:
  • System Health Indicators.
  • Identification of new and status of existing equipment/component vulnerabilities.
  • HFIR 3-Year Planning Activities.
  • Identification of Spare Parts deficiencies and single point vulnerabilities.
  • Walk-Downs to Assess System Configuration and Material Condition.
  • Evaluation of surveillance test results.
  • Assessment of open Modifications, Deviations and Corrective Work Packages.

Basic Qualifications:

  • Bachelor’s Degree in engineering or related field and a minimum of 8 years of experience with mechanical emphasis. An equivalent combination of education and experience may be considered.
  • Must possess strong oral and written communication skills, demonstrate good interpersonal skills, and work well as a team member.
  • Requires ability to diagnose mechanical equipment problems and develop formal work package instructions for performance and documentation of repairs.
  • A strong understanding of reading and interpreting mechanical design drawings.


Preferred Qualifications:

  • At least six months of experience at the HFIR site.
  • Experience with design and maintenance activities in a nuclear reactor operating environment.
  • Experience with design of piping systems, pressure vessels, reactor core structures, mechanical components, and    HVAC at a nuclear facility.
  • Knowledge of applicable codes and standards, such as ASME Boiler and Pressure Vessel Code, ASME B31 piping codes, ASME Y14.5M Dimensioning and Tolerancing, and ASME NQA-1 Nuclear Quality Assurance.
  • Experience with the regulatory programs which define the HFIR work environment, including DOE Orders pertaining to conduct of operation and maintenance, OSHA requirements, and ASME standards would be a plus.
  • Experience in project management, leading maintenance tasks, procedure development, procurement of materials, and equipment analysis is desired.


Other Job Requirements:
This position requires some physical activity, such as carrying lightweight items, climbing ladders, etc. 

This position also requires Radiological Worker II and Confined Space training. Some work may be done in Radiological Areas and in confined spaces.


This position requires the ability to obtain and maintain an “L” 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.


This position is subject to adverse weather conditions and is subject to emergency call back for after-hours work. 


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 for more than 3,000 visiting scientists.  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, and fitness facilities.


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.

For more information about our benefits, working here, and living here, visit the “About” tab at




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.

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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.

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