Oak Ridge, Tennessee, United States · Remote OK
Boston Government Services, LLC. (BGS) is seeking an Nuclear Criticality Safety Engineer to support our clients in Oak Ridge, TN. BGS is an engineering, technology, and security firm helping to advance missions of nation…
Skills: Nuclear Criticality Safety, Hazard Analysis, Computational Analysis, Safety Documentation, Regulatory Compliance
Oak Ridge, Tennessee, United States · On-site
Requisition Id 16765 Overview: The National Center for Computational Sciences (NCCS) at the Oak Ridge National Laboratory (ORNL) is seeking a postdoctoral research associate in the area of HPC Confidential Computing and …
Skills: Confidential Computing, Secure Multi-tenancy, HPC System Software, Memory Encryption, Trusted Execution Environments
Oak Ridge, Tennessee, United States · On-site
Requisition Id 16907 Overview: The Advanced Engineering Technologies (AET) Group is seeking a Computational Fluid Dynamics Analyst specializing in the use and development of computational simulation software for complex …
Skills: Computational fluid dynamics, Aerodynamic systems, Simulation software, Numerical analysis, Finite element methods
Oak Ridge, Tennessee, United States · On-site
Requisition Id 16910 Overview: Oak Ridge National Laboratory is the largest US Department of Energy science and energy laboratory, conducting basic and applied research to deliver transformative solutions to compelling p…
Skills: Electrical engineering, Power electronics, Circuit theory, Analog circuits, Digital circuits
Oak Ridge, Tennessee, United States · On-site
Requisition Id 16766 Overview: The National Center for Computational Sciences (NCCS) at the Oak Ridge National Laboratory (ORNL) is seeking a postdoctoral research associate in High-Performance Computing (HPC) system arc…
Skills: HPC System Architecture, Intelligent Storage Design, Telemetry Analysis, Performance Modeling, High-Bandwidth Memory
Oak Ridge, Tennessee, United States · On-site
Requisition Id 16764 Overview: The National Center for Computational Sciences (NCCS) at the Oak Ridge National Laboratory (ORNL) is seeking a postdoctoral research associate in the area of Application-driven Composable D…
Skills: Distributed Storage, High-Performance Computing, Scientific AI, Edge Computing, I/O Performance Characterization
Oak Ridge, Tennessee, United States · On-site
Requisition Id 16728 Overview: The Manufacturing Energy Efficiency Research and Analysis (MEERA) Group at Oak Ridge National Laboratory (ORNL) is seeking a Technical Professional to support the U.S. Department of Energy'…
Skills: Instrumentation and Controls, Data Acquisition, Calibration Management, Energy Measurement, Technical Assistance
Oak Ridge, Tennessee, United States · On-site
Take the next step in your career with Morrison Healthcare as a Dietitian in Oak Ridge, TN! Location: Morrison Healthcare at Methodist Medical Center Setting: Acute Care Schedule: Full time, Monday - Friday, with weekend…
Skills: Medical Nutrition Therapy, Nutritional Assessments, Care Planning, Clinical Nutrition, Patient Education
Oak Ridge, Tennessee, United States · Remote OK
$113k–$188k/yr
Job Description Overview We are seeking a Senior Mechanical Analyst Energy – Remote. This remote position is based out of our Oak Ridge, TN office. Your role AtkinsRéalis US Nuclear is the subsidiary of AtkinsRéalis focu…
Skills: Mechanical engineering, Computational fluid dynamics, Structural analysis, ANSYS FLUENT, ANSYS CFX
Oak Ridge, Tennessee, United States · On-site
$86k–$136k/yr
At BWX Technologies, Inc. (NYSE: BWXT), we are People Strong, Innovation Driven. A U.S.-based company, BWXT is a Fortune 1000 and Defense News Top 100 manufacturing and engineering innovator that provides safe and effect…
Skills: Metallurgical engineering, Materials science, Alloy development, Additive manufacturing, Failure analysis
Oak Ridge, Tennessee, United States · On-site
Overview Clinical Laboratory Assistant | Senior Clinical Laboratory Assistant, General Laboratory PRN/OCC, Variable Shifts Methodist Overview: Methodist Medical Center of Oak Ridge, part of Covenant Health, is a trusted …
Skills: Phlebotomy, EKG, Specimen processing, Patient identification, Accessioning
Oak Ridge, Tennessee, United States · Hybrid
Requisition Id 17077 Overview: The Office of Technical Training (OTT) at Oak Ridge National Laboratory (ORNL) seeks an Instructional Designer to lead the analysis, design, and development of complex learning solutions th…
Skills: Instructional Design, Systematic Approach to Training, Task Analysis, Learner Analysis, Context Analysis
Alameda, California, United States · On-site
$30/hr–$34/hr
Company Overview Kairos Power is a new nuclear energy technology and engineering company whose mission is to enable the world’s transition to clean energy, with the ultimate goal to dramatically improve people’s quality …
Skills: Instrumentation and Control Systems, LabVIEW, PLC, Control System Analysis, Industrial Communication Protocols
Alameda, California, United States · On-site
$30/hr–$34/hr
Company Overview Kairos Power is a new nuclear energy technology and engineering company whose mission is to enable the world’s transition to clean energy, with the ultimate goal to dramatically improve people’s quality …
Skills: Nuclear Engineering, Computational Modeling, Python, MATLAB, Reactor Physics
Alameda, California, United States · Remote OK
$175k–$218k/yr
Company Overview Kairos Power is a new nuclear energy technology and engineering company whose mission is to enable the world’s transition to clean energy, with the ultimate goal to dramatically improve people’s quality …
Skills: Heat Transfer, Thermodynamics, Fluid Mechanics, Molten Salt Systems, Power Conversion Systems
Alameda, California, United States · On-site
$28/hr–$32/hr
Company Overview Kairos Power is a new nuclear energy technology and engineering company whose mission is to enable the world’s transition to clean energy, with the ultimate goal to dramatically improve people’s quality …
Skills: Chemical Engineering, Materials Science, MATLAB, AutoCAD, Python
Alameda, California, United States · Remote OK
Company Overview Kairos Power is a new nuclear energy technology and engineering company whose mission is to enable the world’s transition to clean energy, with the ultimate goal to dramatically improve people’s quality …
Skills: Nuclear Reactor Design, Reactor Systems Engineering, Technical Leadership, System Architecture, Thermal Hydraulics
Alameda, California, United States · On-site
$30/hr–$32/hr
Company Overview Kairos Power is a new nuclear energy technology and engineering company whose mission is to enable the world’s transition to clean energy, with the ultimate goal to dramatically improve people’s quality …
Skills: Mechanical Design, Manufacturing Engineering, CAD, SolidWorks, AutoCAD
Oak Ridge, Tennessee, United States · On-site
Company Overview Kairos Power is a new nuclear energy technology and engineering company whose mission is to enable the world’s transition to clean energy, with the ultimate goal to dramatically improve people’s quality …
Skills: Mechanical engineering, Remote handling, Modular hardware design, Full-scale integration, Rapid prototyping
Oak Ridge, Tennessee, United States · On-site
Requisition Id 17078 Overview: We are seeking a Postdoctoral Research Associate to join the Data Science and Engineering for Nonproliferation Group in the National Security Sciences Directorate (NSSD). In this role, you …
Skills: Bayesian methodologies, System dynamics, Python, Probabilistic programming, Statistical modeling
Oak Ridge, Tennessee, United States • Remote OK
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The Nuclear Criticality Safety Engineer will perform criticality safety evaluations and hazard analyses for systems involving fissile materials. They will also develop safety documentation, implement controls, and provide technical guidance to ensure compliance with regulatory standards.
Candidates must have a bachelor's degree in a technical discipline or equivalent experience, along with at least 5 years of experience in the nuclear industry. Proficiency in MCNP or SCALE software and eligibility for a security clearance are required.
Boston Government Services, LLC. (BGS) is seeking an Nuclear Criticality Safety Engineer to support our clients in Oak Ridge, TN.
BGS is an engineering, technology, and security firm helping to advance missions of national importance for government programs, national laboratories, national security facilities, nuclear operations, and complex projects. We support clients at every stage, from strategic planning and program management to the execution of engineering and technical activities. We work to attract and retain the best talent because the best talent delivers the best results for our clients. Our capabilities are based on our experience in complex, secure, and highly regulated environments. We leverage our experience and capabilities to provide mission-driven solutions tuned to our client's mission needs and strategic direction.
Work that Matters. People that Matter More. At BGS, we believe meaningful work starts with great people. We foster a culture built on respect, collaboration, and accountability—where employees are empowered to contribute ideas, grow professionally, and make an impact. We care about our employees’ well-being through competitive benefits, clear expectations, and an environment that values both excellence and connection.
If you align with BGS’ company values and culture, we would love for you to explore opportunities to join our growing team by checking out the job description below!
Responsibilities:
As the Nuclear Criticality Safety Engineer, you’ll perform criticality safety evaluations for systems that provide the safe handling, storage, processing, and transportation of fissile materials. The work may involve performance of hazard analysis, computational analyses, validation, development of safety controls, documentation, guidance on criticality safety practices, and supporting compliance with applicable regulatory and safety requirements.
Requirements:
Location/Work Arrangement:
Benefits:
BGS offers a competitive total compensation package to eligible employees. Benefits include Health, Dental, Vision, Life Insurance, Paid Vacation, 401K, Long and Short-Term Disability.
EEO:
BGS is an Equal Opportunity/Affirmative Action employer. All qualified applicants are encouraged to apply and will receive consideration for employment without regard to race, color, religion, sex, national origin, disability, or protected veteran status.
Exclusive Agreement Disclaimer:
BGS has standing contracts with federal agencies throughout the United States. We require an affirmative exclusive agreement to represent all candidates to our clients. By submitting this application, you are consenting to allow BGS to represent you as a candidate for the role in which you are applying.
Work that Matters. People that Matter More.
Boston Government Services, LLC (BGS) is an engineering, technology, and security firm providing mission-focused solutions for the clean energy, nuclear, and federal programs markets. Our unique capabilities and experience in complex, secure, and highly regulated environments allows us to provide tailored solutions for each client’s critical mission needs.
Offices: 105 Mitchell Rd, Suite 101, Oak Ridge, Tennessee 37830, US · 490 L'Enfant Plaza E, Suite 2200, Washington, District of Columbia 20024, US · 2325 W Broadway St, Suite C, Idaho Falls, Idaho 83402, US
There are currently 393 open science & research positions in Oak Ridge, TN listed on Clera. New openings are added daily as companies post roles.
Companies currently hiring include Oak Ridge National Laboratory, AtkinsRéalis, Boston Government Services, LLC (BGS), Akima Global Services, LLC, AMETEK, among others. Browse the listings above to see every active employer.
Yes — 48 of the 393 open science & research positions offer remote or hybrid work (20 remote, 28 hybrid).
Each listing links directly to the employer's application page. Apply early — fresh listings get the most recruiter attention in the first two weeks.
