Distinguished Rotor Dynamics Researcher

Requisition Id15973

Overview:

The Centrifuge Science (CS) Section within the Enrichment Science and Engineering Division (ESED) at Oak Ridge National Laboratory (ORNL) is seeking a Rotor Dynamics Analyst for theMechanical Systems Modeling Group (MSM). The Distinguished Rotor Dynamics Researcher will serve as a technical authority in the analysis and prediction of complex rotating system behavior, with primary responsibility for performing advanced rotor dynamic analyses and leading the research and development of next-generation modeling capabilities. This role focuses on improving the fidelity and predictive accuracy of analytical and computational tools used to characterize the dynamic performance of gas centrifuge rotors and their associated suspension systems.

Purpose:

ESED serves the nation in two critical areas: advancing enrichment technologies and exploring enriched stable isotope production and applications. The division leverages an elite staff of scientists and engineers with the world-leading capabilities of ORNL to deliver groundbreaking advancements with a variety of applications, from national security to life-saving medical treatments. ESED is the national steward for the research, development, and demonstration of centrifuge technology. The successful candidate will provide research and development (R&D) leadership to the group that strategically advances science and technology focused on gas testing of prototype enrichment devices for processing uranium-bearing and stable isotope compounds.

The Mechanical Systems Modeling Group applies first-principles physics and empirically informed methods to advance the fundamental engineering understanding of gas centrifuge systems. The group leverages analytical techniques and advanced computational tools-including finite element analysis (FEA)-to evaluate and predict the behavior of complex rotating machinery operating under extreme conditions. Through the integration of modeling, simulation, and experimental validation, the group supports the design, performance optimization, and reliability of gas centrifuges used in the processing of uranium and stable isotope compounds.

Within this organization, the Distinguished Rotor Dynamics Researcher serves as a senior technical authority and thought leader in rotor dynamics, bearings, and suspension systems, including squeeze film dampers. The individual will lead and execute research and development (R&D) efforts aimed at improving the predictive accuracy of models and enhancing the understanding of dynamic phenomena governing high-speed centrifuge operation. This includes advancing analytical and computational methods, guiding experimental validation activities, and translating technical insights into improved system designs and operational performance.

Major Duties and Responsibilities:

Major responsibilities for this senior role include leading and executing advanced research initiatives focused on the dynamic performance characterization of enrichment devices and their associated subassemblies. The successful candidate will drive the development of high-fidelity dynamic simulation tools to model complex rotating systems and will apply advanced rotor analysis and design codes to predict rotor and suspension behavior across design and test environments.

This role requires both deep technical expertise and strategic leadership in extending modeling capabilities through the modification of existing frameworks and the development of new physics-based dynamic models. The candidate will lead the planning, coordination, and execution of experimental validation campaigns, ensuring strong correlation between simulation predictions and measured system performance.

In addition, the successful candidate will collaborate closely with design engineers, manufacturing teams, and external research partners to ensure that modeling insights are effectively translated into practical design improvements, test strategies, and operational recommendations. This role requires clear technical communication, mentorship of junior staff, and the ability to influence program direction through data-driven engineering judgment and recognized subject-matter expertise.

Key Responsibilities:

• Independently lead and perform advanced rotor dynamic analyses for complex rotating machinery systems.
• Provide technical leadership across research, design, and experimental troubleshooting activities at the group, section, and division levels.
• Serve as a recognized subject matter expert in rotor dynamics, bearings, seals, and squeeze film dampers, developing custom physics-based models to accurately characterize system and subsystem performance.
• Direct and coordinate cross-functional project activities, ensuring high-quality execution and clear communication of technical results.
• Produce high-quality, peer-reviewed technical documentation in accordance with Division Quality Program requirements and best practices.

Basic Qualifications:

• PhD in Mechanical Engineering, Engineering Science and Mechanics, or a closely related engineering or scientific discipline with a minimum of 12 years of relevant post-graduate experience; or a Master's degree in a related field with at least 16 years of progressively responsible professional experience in advanced engineering analysis, research, and development.
• Established record of technical scholarship, including peer-reviewed journal publications, conference proceedings, or other recognized technical contributions demonstrating thought leadership in rotor dynamics or related disciplines.
• Demonstrated depth of expertise in rotor dynamics and rotating machinery, including rotor stability analysis and the behavior of bearings (hydrodynamic and rolling element), seals, and squeeze film dampers. Candidates should have significant applied experience in dynamic system modeling, experimental testing, signal processing, and advanced data analysis for complex mechanical systems.
• Extensive experience correlating analytical predictions with experimental measurements, including the design and execution of dynamic test programs, instrumentation selection, and interpretation of high-frequency measurement data.
• Demonstrated ability to lead technically complex projects, provide strategic direction in modeling and simulation, and mentor junior engineers and researchers.
• Experience collaborating with cross-functional teams and external partners such as national laboratories, government agencies, or academic institutions is highly desirable.
• The ability to obtain and maintain a security clearance from the Department of Energy, which requires US Citizenship.

Preferred Qualifications:

• Advanced computational proficiency with extensive modeling and simulation experience using rotor dynamic analysis codes and custom-developed numerical tools for rotating machinery.
• Demonstrated experience developing and implementing multi-physics simulation frameworks for rotating systems, incorporating coupled structural, fluid, thermal, and nonlinear dynamic effects.
• Experience developing and deploying digital twin architectures for rotating equipment, including model calibration, real-time data integration, condition monitoring, and predictive diagnostics.
• Proficiency in dynamic and vibration analysis using commercial finite element and multiphysics platforms such as ANSYS and ABAQUS, as well as experience integrating these tools with in-house or custom-developed analysis environments.
• Strong programming and data analysis capabilities using engineering tools such as MATLAB and/or Python for model development, automation, signal processing, and large-scale data analysis.
• Active or eligible for a U.S. Department of Energy (DOE) Q clearance.

Special Requirements:

• Visa sponsorship is not available for this position.
• This position requires the ability to obtain and maintain a clearance from the Department of Energy. As such, this position is a Workplace Substance Abuse (WSAP) testing designated position. WSAP positions require passing a pre-placement drug test and participation in an ongoing random drug testing program.

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 or call 1.866.963.9545.

Relocation:Moving can be overwhelming and expensive. UT-Battelle offers a generous relocation package to ease the transition process. Domestic and international relocation assistance is available for certain positions. If invited to interview, be sure to ask your Recruiter (Talent Acquisition Partner) for details.

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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.

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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.