Senior Nuclear Mechanical Engineer

Requisition Id 15812 

 

Overview:    

We are seeking a  Senior 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:   

• Lead and independently execute engineering design efforts for new and upgraded HFIR structures, systems, and components. 

• Implements modifications in accordance with RRD configuration control processes. 

• Perform and validate complex calculations; apply codes and standards; develop detailed design and material specifications. 

• Provide technical oversight for fabrication, assembly, and implementation of approved design changes. 

• Ensure technical accuracy and approve drawings, system documentation, and as-built records. 

• Lead troubleshooting efforts and develop technically sound work instructions for maintenance activities. 

• Provide field technical support and contribute to preventive and lead preventive and predictive maintenance planning efforts. 

• Lead operability assessments and evaluate performance data to identify trends, vulnerabilities, and risks. 

• Conduct system walk-downs, evaluate system health, and help identify spare-parts and planning needs. 

• 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: 

• A BS degree in mechanical engineering or related field, and at least 8 years of related experience.  

• Experience with ASME piping codes and process piping system design.  

• Experience diagnosing mechanical equipment problems and developing formal work package instructions for performance and documentation of repairs. 

• A strong understanding of reading and interpreting mechanical design drawings.  

 

Preferred Qualifications: 

• Experience supporting engineering, maintenance, or project tasks in a technical environment. 

• Ability to read mechanical drawings and apply basic GD&T concepts. 

• Experience troubleshooting mechanical or HVAC systems. 

• Understanding of machining and fabrication practices, including welding/joining techniques, combined with a sound understanding of machine design. 

• Exposure to regulated, safety-focused environments (DOE, NRC, or similar). 

 

Special Requirements: <