In Vivo Technical Specialist

Date: Feb 6, 2026

Location: Oak Ridge, TN, US, 37830

Company: Oak Ridge National Laboratory

Requisition Id 15873 

 

Overview:

The Nuclear Measurements and Analytical Services (NMAS) Group within the Nuclear and Radiological Protection Division (NRPD) at Oak Ridge National Laboratory (ORNL) is seeking an In Vivo Staff Member to support the Nuclear and Radiological Measurements (NRM) team in the operation of the ORNL In Vivo Laboratory. ORNL’s internal dosimetry program is accredited by the Department of Energy Laboratory Accreditation Program (DOELAP) for personnel dosimetry, with NRM providing whole body, lung, and wound counting services to radiological workers at ORNL and other Department of Energy prime contractors in the Oak Ridge, Tennessee area.

 

ORNL is the largest U.S. Department of Energy science and energy laboratory, conducting both basic and applied research to deliver transformative solutions to critical challenges in energy and national security. The Nuclear and Radiological Protection Division partners with research and operations staff to enable the Laboratory’s scientific mission while protecting personnel from nuclear and radiological hazards and ensuring compliance with applicable regulatory requirements.

 

Major Duties/Responsibilities:

  • Support the day-to-day operation of the whole-body counting, lung counting, and wound counting capabilities, facilities, instrumentation, and metrics.
  • Review in vivo measurement results, calculations, logs, and QC data.
  • Support DOELAP accreditation activities for the in vivo counting laboratory.
  • Perform system calibrations, validations, and verifications under the direction of the NRM Manager.
  • Maintain equipment and assist in troubleshooting instrumentation issues.
  • Assist in the development, updating, and reviewing procedures, reports, and other technical documentation to support of the In vivo Laboratory.
  • 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.
  • 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, radiochemistry, nuclear engineering, radiation protection or related technical field with 2 years of relevant experience, or a MS degree with 1 year of relevant experience.
  • Prior experience with gamma spectroscopy and other nuclear instrumentation.
  • Ability to lift, carry, and maneuver field spectroscopy equipment. As such, a pre-hire physical will be required after offer.

 

Preferred Qualifications:

  • Experience with Mirion’s Genie2K software.
  • Knowledge of Mirion’s APEX In-vivo and Abacos2K software applications.
  • Experience with troubleshooting HPGe detectors and/or other nuclear instrumentation.
  • Ability to collaborate with other staff to address novel and complex technical issues.
  • Excellent oral and written communication skills.
  • Motivated self-starter with the ability to work independently and to participate creatively in collaborative teams across the laboratory.
  • Excellent organization, communication, writing, and interpersonal skills, with a demonstrated ability to interface with technical staff, auditors, regulators, and customers from varied disciplines and backgrounds.
  • Motivated self-starter with the ability to work independently and to participate creatively in collaborative teams across the laboratory.

 

Special Requirements:

  • Physical Requirements: Work involves various physical requirements and working conditions. As such, a pre-hire physical will be required after offer.
  • HSPD-12 PIV badge: This position requires the ability to obtain and maintain an HSPD-12 PIV badge.
  • 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.

 

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.


Nearest Major Market: Knoxville