Senior Radiological Engineer

Date: May 6, 2026

Location: Oak Ridge, TN, US, 37830

Company: Oak Ridge National Laboratory

Requisition Id 16398 

 

Overview:

We are seeking a Senior In Vivo Radiological Engineer who will focus on In Vivo operations and administration of the Internal Dosimetry Program Laboratory Information Management System (LIMS). This position resides on the Nuclear and Radiological Measurements (NRM) team of the Nuclear Measurements and Analytical Services (NMAS) Group within the Nuclear and Radiological Protection Division (NRPD) under the Environmental, Safety, Health, and Quality directorate at Oak Ridge National Laboratory (ORNL).

 

The ORNL Internal Dosimetry Program is accredited by the Department of Energy Laboratory Accreditation Program (DOELAP) for Radiobioassay (In Vivo and In Vitro), for which NRM provides whole body counting, lung counting, and wound counting services at ORNL and other DOE prime contractors in Oak Ridge, TN.

 

Major Duties/Responsibilities:

  • Oversee the day-to-day operation of the whole-body counting, lung counting, and wound counting capabilities, facilities, instrumentation, and metrics.
  • Review and approve in vivo measurement results, calculations, logs, and QC data.
  • Ensure that equipment maintenance and calibrations are kept up to date.
  • Maintain DOELAP accreditation for the in vivo counting laboratory.
  • Ensure that in vivo laboratory personnel are trained and qualified to perform their assigned duties.
  • Develop/revise/maintain procedures and technical documents related to the in vivo laboratory instrumentation and operations.
  • Participate in incident/accident-based investigations requiring in vivo measurement support due to potential intakes of radioactive material.
  • Troubleshoot equipment and other technical issues as necessary.
  • Develop equipment life-cycle schedule/plan.
  • Manage data for the ORNL Internal Dosimetry Program. Serve as the administrator/ software owner for the Laboratory Information Management Systems (LIMS) used for Internal Dosimetry operations and work with NRPD personnel, IT personnel, and other supporting groups to maintain and improve the LIMS.
  • Assess LIMS user requests and implement changes that keep the system aligned with evolving operational needs, including new assays, workflows, and system integrations.
  • Interface with other ORNL Internal Dosimetry Program technical staff, auditors, customers, vendors, and suppliers, as required.
  • Participate in audits, inspections, verifications, and surveillances.
  • Support other activities in the Nuclear Measurements and Analytical Services Group as needed.
  • Ensure all work is carried out safely, securely, and in compliance with ORNL’s ESH&Q policies, standards, and procedures.
  • 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:

  • BS Degree in health physics, nuclear engineering, physics, chemistry, or a related technical field.
  • Eight or more years of professional experience in health physics, nondestructive assay, or operational radiation protection.
  • Demonstrated experience with nuclear measurements and gamma spectroscopy applications.
  • Knowledgeable of laboratory quality assurance processes and procedure development.
  • Experience with relational databases, SQL, and scripting languages (e.g. Python, PowerShell).

 

Preferred Qualifications:

  • An advanced science or engineering degree in directly related discipline (e.g. health physics, physics, radiochemistry, etc.) will be given appropriate consideration in lieu of experience.
  • Well versed in current regulatory and consensus standards for radiobioassay.
  • Advanced computing skills, including data reduction, analysis, and presentation.
  • Advanced knowledge and experience with laboratory information management systems.
  • Knowledge of Mirion’s Genie 2k, APEX In-vivo, and Abacos2K software applications with HPGe and NaI detectors.
  • Knowledge of in vitro radiobioassay analyses and workflow.
  • Excellent written and oral communication skills.
  • Motivated self-starter with the ability to work independently and to participate creatively in collaborative teams across the laboratory.
  • Ability to function well in a fast-paced research environment, set priorities to accomplish multiple tasks within deadlines, and adapt to ever changing needs.

 

Special Requirements:

  • Physical Requirements: Work involves various physical requirements and working conditions. As such, a pre-hire physical will be required after offer.
  • Visa Sponsorship: Visa sponsorship is not available for this position.

 

Security, Credentialing, and Eligibility Requirements:

  • This position requires the ability to obtain and maintain an HSPD-12 PIV badge.
  • 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.

 

About ORNL:

As a U.S. Department of Energy (DOE) Office of Science national laboratory, ORNL has an impressive 80-year legacy of addressing the nation’s most pressing challenges. Our team is made up of over 7,000 dedicated and innovative individuals! Our goal is to create an environment where a variety of perspectives and backgrounds are valued, ensuring ORNL is known as a top choice for employment. These principles are essential for supporting our broader mission to drive scientific breakthroughs and translate them into solutions for energy, environmental, and security challenges facing the nation.

 

ORNL offers competitive pay and benefits programs to attract and retain individuals who demonstrate exceptional work behaviors. The laboratory provides a range of employee benefits, including medical and retirement plans and flexible work hours, to support the well-being of you and your family. Employee amenities such as on-site fitness, banking, and cafeteria facilities are also available for added 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, 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: ORNLRecruiting@ornl.gov.

 

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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.

 

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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