Nuclear/Mechanical Engineer - HFIR PVR Project
Strata-G, LLC
At Strata-G, we define significance by the extraordinary people we hire, the relationships we build with our clients, and the positive impact we make in the community. Our team of intellectually curious and highly motivated engineers, scientists and business professionals engages with our clients to solve complex energy and environmental challenges around the world.
We are driven by our values to create a culture of significant and positive change for our clients and the world.
We Care We treat our customers and employees as we wish to be treated. Integrity We are honest and ethical in every endeavor. Service We continuously strive to please our customers and to exceed their expectations. Quality We maintain a culture of continuous improvement. Safety We hold paramount the safety and health of our associates, our customers, the public, and the environment. Innovation We develop creative solutions to better serve our customers. Attitude We maintain a positive attitude and value humor. Outreach We share the results of our successes with the community.
Strata-G is seeking an experienced Nuclear/Mechanical Engineer - HFIR PVR Project with the following:
Summary:
Client is currently preparing for two exciting major replacement projects, the reactor pressure vessel and the beryllium reflector, to sustain and enhance HFIR's operation performance. Both projects require engineering, design, and analysis support to complement the integrated project team to deliver the design milestones on schedule and within scope. Specifically, the individual will be working closely with system engineers, designers, and various other disciplines within RRD. This position will be assigned to the HFIR Upgrades Project Office and interacts with personnel at all levels within HFIR.
The project is seeking an experienced engineering professional with over 10 years of hands-on experience at an operating nuclear reactor, including expertise in engineering design and manufacturing practices. The ideal candidate will have a strong background in welding and joining techniques, combined with a solid understanding of machine design principles.
This role requires a comprehensive knowledge of ASME Boiler and Pressure Vessel Codes (Sections III and VIII) and ASME B31.1 piping codes, with proven ability to apply these standards in practical scenarios. The position involves performing and reviewing piping analyses and calculations in compliance with HFIR Safety Basis Procedures and applicable Department of Energy (DOE) standards and guidelines.
Additionally, this role will support efforts to restore HFIR's operating power from 85 MW back to 100 MW as part of the PVR Project. This project is currently in the early stages of Critical Decision-1 (CD-1), as defined by DOE Order 413.3B.
• Apply engineering expertise to support HFIR operations.
• Prepare engineering designs for new installations and for replacement or upgrade of HFIR structures, systems, and components (SSCs).
• Perform calculations and analyses to support design basis and requirements.
• Apply relevant codes and standards, including ASTM, ASME Boiler and Pressure Vessel Code, ASME B31 piping codes, NQA-1, AWS, etc.
• Support development of reactor core component replacement plans.
• Prepare design specifications and define acceptance criteria for component upgrades.
• Update material specifications and provide technical support for material procurement.
• Implement modifications in accordance with RRD configuration control processes.
Requirements:
• Bachelor's degree in mechanical engineering, nuclear engineering, or related discipline• Minimum of 10 years in DOE nuclear facilities and/or commercial nuclear plants.
• Comprehensive understanding of nuclear technology, including reactor safety basis, design, and construction.
• Proficiency in engineering design and manufacturing practices, including welding and joining techniques and machine design.
• Familiarity with DOE Orders and Standards (e.g., DOE O 420.1C, DOE STD 1189, DOE STD-1073-2016).
• Strong ability to read and interpret mechanical design drawings and apply GD&T principles (ASME Y14.5).
• Experience with AutoPIPE and finite element analysis is desirable.
• Experience with configuration management and engineering change control processes in a nuclear environment.
Job Type: Full Time
Job Location: Oak Ridge, TN. Onsite only.
Strata-G will not sponsor applicants for immigrant or non-immigrant work visas. The successful candidate will be required to submit evidence of identity and employment authorization. Tests for the absence of any illegal drug as defined in 10 CFR 707.4, will be conducted by Strata-G and a background investigation by the Federal government may be required to obtain an access authorization prior to employment. Strata-G is an Equal Employment Opportunity (EEO) employer. It is the policy of the Company to provide equal employment opportunities to all qualified applicants without regard to race, color, religion, sex, sexual orientation, national origin, age, gender identity, protected veteran or disabled status. All job descriptions are evaluated for physical/mental standards prior to posting based on AAP guidelines.
- ...Our team of intellectually curious and highly motivated engineers, scientists and business professionals engages with our... ...the community. Strata-G is seeking an experienced Nuclear I&C Engineer - HFIR PVR Project with the following: Summary: Client is currently...ProjectFull timeContract workWork at officeWork visa
- ...team of intellectually curious and highly motivated engineers, scientists and business professionals engages with... ...the community. Strata-G is seeking an experienced Nuclear Structural - Civil Engineer HFIR Project with the following: Summary: The purpose of...ProjectFull timeContract workWork at officeWork visa
- ...construction services, specializing in Federal and Commercial projects. Our company is committed to delivering high-quality... ...client requirements. Position Overview: NEC is seeking a Mechanical Engineer-PE with experience in piping systems and fluid transfer including...ProjectFull timeFor contractors
- ...specializing in Federal and Commercial projects. Our company is committed to delivering... ...The Rotordynamics Development and Testing Engineer will spearhead engineering process innovation... ...: • Bachelor of Science in Mechanical Engineering with 10 years of relevant experience...Project
- ...Description Job Description MS Technology, Inc. is seeking a Sr. Mechanical Engineer to support our client in Oak Ridge, TN. Summary: This... ...with components, assemblies, and machines within the project, providing technical expertise to help achieve program goals...ProjectTemporary work
- ...curious and highly motivated engineers, scientists and business professionals... ...exciting major replacement projects, the reactor pressure vessel... ..., to sustain and enhance HFIR's operation performance. Both... ...the core alignment plan for the PVR Project. Following this phase,...ProjectFull timeContract workWork at officeWork visa
- ...Description Navarro Research and Engineering is recruiting for a Senior Mechanical Design Engineer in Oak Ridge, TN.... ...for complex challenges in the nuclear and environmental fields. Joining... ...with minimal supervision, ensuring projects meet operational, regulatory, and...ProjectContract workTemporary workFor contractors
- ...Position: Senior Mechanical Design Engineer Location: Onsite in Oak Ridge, TN Clearance: Ability to obtain and maintain a DOE Q clearance Job... ...engineering expertise to support the design and execution of projects involving data center construction, renovation, and other...Project
- ...Job Overview MS Technology, Inc. is seeking a Mechanical Engineer with facility (e.g., piping/plumbing design, HVAC, facility utilities... .../pneumatics) design experience to support complex nuclear and industrial projects. The ideal candidate will have experience developing...ProjectFor subcontractor
- ...Job Title: Tooling Design Engineer Location: Oak Ridge, TN What You’ll Do As a tooling engineer... ...work as a team member of an integrated project team, or as a technical lead for a multi... ...major 2 years job‑related, and 1‑year nuclear experience; or a DOE O 426.2A...ProjectInterim roleSecond jobFlexible hours
$80k - $90k
...Description Overview AtkinsRéalis is seeking a Nuclear Process Engineer to join our Commercial Nuclear Team. This... ...safety and non-safety related process and mechanical components and system designs for commercial nuclear projects. Interface with the other technical...ProjectFull timeTemporary workWork at officeFlexible hours$80k - $90k
...Description Overview AtkinsRéalis is seeking a Nuclear Electrical Engineer to join our Commercial Nuclear Team. This... ...electrical systems for commercial nuclear projects. Interface with the other technical disciplines (mechanical, nuclear, operations and electrical...ProjectFull timeTemporary workWork at officeFlexible hours- MS Technology, Inc. is seeking a Nuclear Criticality Safety Engineer to support our clients in Oak Ridge, TN. The Nuclear Criticality Safety Engineer... ...Must have experience with DOE and/or commercial nuclear projects Benefits: All eligible employees enjoy an...ProjectFull timeTemporary work
$137.5k - $160k
...provide relocation support. Global Engineering & Technology (GET) is seeking a highly qualified engineer with National Nuclear Security Administration (NNSA) experience... ...Security Administration (NNSA) facilities and projects. DOE O 425.1 VERIFICATION OF READINESS...ProjectFull timeTemporary workLocal areaRemote workRelocation package- ...Description Job Description MS Technology, Inc. is seeking a Mechanical/Manufacturing Engineer to support our client in Oak Ridge, TN. Description... ...degree in Mechanical Engineering, Chemical Engineering, Nuclear Engineering, or a related discipline from an ABET EAC–...Temporary workFor contractorsWork experience placementWork at office
$80k - $90k
...Description Overview AtkinsRéalis is seeking a Nuclear Piping Engineer to join our Commercial Nuclear Team. This is... ...analyze of safety and non-safety piping and mechanical components and designs for commercial nuclear projects. Create detailed engineering drawings, P&...ProjectFull timeTemporary workWork at officeFlexible hours- ...intellectually curious and highly motivated engineers, scientists and business professionals... ...Strata-G is seeking an experienced Mechanical Engineer with the following: Summary... ...power and cooling related infrastructure projects. Construction and renovation projects...ProjectContract workRemote workWork visa
- MS Technology, Inc. is seeking a Mechanical Engineer with facility (e.g., piping/plumbing design, HVAC, facility utilities) and/... ...hydraulics/pneumatics) design experience to support complex nuclear and industrial projects. The ideal candidate will have experience developing...ProjectFull timeTemporary workFor subcontractorWork at officeRemote work
- ...Description Job Description Navarro Research and Engineering is recruiting for a Senior Mechanical Engineer in Oak Ridge, TN. Navarro Research & Engineering... ...effective solutions for complex challenges in the nuclear and environmental fields. Joining Navarro means being...Contract workTemporary workFor contractors
$119k - $199k
...Description Overview We are seeking a Mechanical Engineering Manager - Remote. This remote position... .... Your role AtkinsRéalis US Nuclear is the subsidiary of AtkinsRéalis... ...delivering engineering, operations, and project management services. Serves both legacy...ProjectFull timeTemporary workWork at officeRemote workFlexible hours- ...POSITION SUMMARY Leads the Project Team to develop and maintain an overall project resource loaded schedule, including projections of field manpower, key man assignments and equipment/tooling requirements that ensure completion of a safe, high quality, and profitable job...ProjectContract workLive in
- ...Spectra Tech, Inc. has an immediate need for a Project Controls Specialists in Oak Ridge, TN. Planner, Scheduler, Project Controls - Provide support which includes P6 experience, schedule development and maintenance, cost analysis and control, earned value measurement,...ProjectImmediate start
- ...management consulting, program and project management, and technical... ..., LLC is seeking a Process Engineer to support a large EPC project... ...will lead chemical and nuclear engineering projects, including... ...Design, develop, and oversee mechanical systems such as UF6 gas handling...ProjectRemote work2 days per week3 days per week
- ...Project Manager Oak Ridge, TN 5/19/2026 The Project Manager will be responsible for overseeing and planning all aspects of mechanical construction and fabrication projects, including but not limited... ...Shop Foremen, Project Engineers and Project Accountants. Change...ProjectFor contractorsFor subcontractorWork at office
- ...Navarro Research and Engineering is recruiting a Project Engineer in Oak Ridge, TN. A DOE Q Clearance or DOD Equivalent is preferred to be considered... ...effective solutions for complex challenges in the nuclear and environmental fields. Joining Navarro means being a...ProjectFull timeContract workTemporary workFor contractorsFor subcontractorLocal area
$128.8k - $205.8k
...an experienced Manufacturing Engineer to lead the technical oversight... ...provided for the ITER project. In this role, you will collaborate... ...complex optical-electrical-mechanical engineering systems. Participate... ...Experience in fields such as nuclear, space, aerospace, or oil &...ProjectHourly payFull timeContract workPart timeFor contractorsWork experience placement- ...Description This position is based at our Corporate Headquarters in Oak Ridge, TN. Job Summary : The IT Project Manager is responsible for supporting the delivery of IT and business initiatives from initiation through completion. This role partners with business stakeholders...ProjectWork experience placement
- ...assessing data quality, and supporting project tool implementations. The position requires... ...(BSAPs) and assure data feeds from engineering and procurement are aligned and functioning... ...experience of DOE, DOD, and/or commercial nuclear construction projects. Working knowledge...ProjectContract work
- ...Project Controls Specialist Strata-G is seeking an experienced Project Controls Specialist, mid‑career with heavy scheduling experience... ...BS/BA in project or construction management, business, engineering, and a minimum of 5 years of relevant experience. An equivalent...ProjectContract work
- ...Position Overview As Project Manager, you will be a part of a leadership team dedicated... ...with counterparts at owner, engineering and design firms Establish a deadline and... ...elevated or confined work areas with moving mechanical equipment and with the fast‑paced nature...ProjectFull timeContract workFor contractorsWork experience placementFor subcontractorWork at officeLocal area
Do you want to receive more vacancies?
Subscribe and receive similar vacancies to Nuclear/Mechanical Engineer - HFIR PVR Project. Be the first to apply!
- nuclear engineer Oak Ridge, TN
- nuclear medicine sales Oak Ridge, TN
- nuclear science Oak Ridge, TN
- nuclear security Oak Ridge, TN
- nuclear Oak Ridge, TN
- nuclear medicine Oak Ridge, TN
- nuclear plant Oak Ridge, TN
- mechanical installation Oak Ridge, TN
- mechanical commissioning Oak Ridge, TN
- entry level mechanical design Oak Ridge, TN


