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Oak Ridge National Laboratory is the Department of Energy’s largest science and energy laboratory with over 5,800 staff from more than 60 countries, 3,000 guest researchers, and a budget of approximately $1.4 billion. The Lab supports the DOE's mission by providing solutions to strengthen the nation’s leadership in key areas of science; increase the availability of clean, abundant energy; restore and protect the environment; and contribute to national security. Career opportunities include internships, postgrads, postmasters, postdoc appointments, distinguished fellowships, business and technical professionals, full-time research staff, and joint faculty appointments. ORNL provides the opportunity to make an important national and even worldly impact. With over 5,800 staff, almost 500 interns every summer, the world’s best neutron source, one of the fastest supercomputers, and over a dozen world-class facilities, the possibilities are endless.
Feb 01, 2026
ORNL TN, USA
Requisition Id 15788    Overview: The Enriched Gaseous Chemistry Group is seeking a Gas Dispensing Engineer or Chemist. This position will have two primary functions: conducting the dispensing of gaseous enriched stable isotopes and supporting advanced enrichment technology outcomes through gas chemistry and/or analytical chemistry research and development. This group focuses on gaseous chemistry R&D, production, dispensing to support the ORNL Stable Isotope Program. Specifically, we handle and dispense enriched gases, transform stable isotopic material into enriched gaseous products, purify and characterize enriched gases, study thermophysical properties of fluorinated gases, conduct material compatibility studies and support R&D efforts to advance ORNL’s enrichment technologies.   This position is part of the Enrichment Science and Engineering Division (ESED) and serves the nation by advancing enrichment technologies and providing enriched stable...
Feb 01, 2026
ORNL TN, USA
Requisition Id 15803    Overview:       We are seeking a Nuclear Mechanical Engineer to join the Systems Engineering (SE) Group within the  Research Reactors Division  (RRD) at Oak Ridge National Lab (ORNL). Our group is responsible for the  High Flux Isotope Reactor  (HFIR) configuration management program. The SE Group also provides technical support to operations and maintenance and performs systems analysis. In this role, you will perform design engineering and support manufacturing and fabrication of reactor core components, fuel elements, control rods and plates, etc. You will also handle maintaining overall cognizance of assigned HFIR structures, systems, and components (SSCs) and provide systems engineering support for operations and maintenance.      Major Duties/Responsibilities:     Support engineering design work for new and upgraded HFIR structures, systems, and components....
Jan 25, 2026
ORNL TN, USA
Requisition Id 15492  Overview:    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. The Field Intelligence Operations Division is seeking a skilled and motivated Enterprise-level Senior Network Engineer to support the management and maintenance of our classified network infrastructure. The ideal candidate will have a solid background in network engineering in areas such as, designing, implementing, maintaining, and troubleshooting...
Jan 25, 2026
ORNL TN, USA
Requisition Id 15573      Overview   We are seeking a visionary and collaborative leader and scholar to serve as the Executive Director and Vice Provost of the University of Tennessee-Oak Ridge Innovation Institute (UT-ORII) . Located at the Oak Ridge National Laboratory (ORNL) in the beautiful foothills of the Great Smoky Mountains and near the lively and historic city of Knoxville, the UT-ORII is an exciting and unique organization that focuses on innovation and education. Building on an 80+ year partnership between ORNL and the University of Tennessee (UT), UT-ORII melds select strengths of both organization to accelerate impacts at scale.  ORNL is the largest Office of Science national laboratory in the U.S. Department of Energy system, with over 7,400 staff, world-leading user facilities, and an extraordinary breadth of expertise across neutron science, computational science, materials science, nuclear energy, isotopes, biological and environmental...