Engineer III, Plant & Process Design

Job Description

X-energy LLC is hiring a Plant & Process Design Engineer to support its team. This role is responsible for designing and developing mechanical systems and components, identifying requirements, conceptualizing system architecture, developing the layout through final design, performing process calculations, selecting and specifying equipment components to meet all technical specifications and program/project requirements. The role also oversees the implementation of rigorous, repeatable system engineering processes, ensures technical integration, monitors risks, and provides system‑level oversight and support.

It manages the entire effort to bring the system from initial requirements to a fully functional operational state in accordance with X‑energy design guides, standards, and sound engineering principles.

• Execute the core tasks and responsibilities, listed in the Job Profile Task/Responsibilities section of this document, with minimal supervision.
• Support the assessment of SSCs for manufacturability as well as assembly and integration considerations at the direction of senior engineers.
• Develop mechanical/physical system design concepts, design and support development of processes to create structures, systems, and components (SSCs).
• Planning/structuring scope for the analyses required to assess aspects of the SSCs to ensure they can perform their intended functions and meet design requirements and specifications.
• Provide independent reviews and acceptance reviews of engineering deliverables and data.
• Oversee documentation to applicable requirements, interfaces, design basis and criteria by coordinating with key stakeholders/systems engineers and identifying applicable industry codes and standards.
• Have a thorough understanding of the requirements contained within industry codes and standards and the intent which is implied.
• Direct the planning for the analyses required to assess all aspects of the SSCs to ensure they can perform their intended functions and meet all technical specifications and requirements.
• Supervise performance of computations utilizing hand calculations and analytical tools for structural, thermal, hydraulic, and other scoping calculations as required to ensure SSCs can meet all technical requirements. Oversee procured items and associated documentation for acceptance and verify compliance of procured services and material with contract specifications.
• Develop and manage implementation of engineering changes in accordance with approved procedures.
• Provide ownership, responsibility, and accountability over technical scope involving the coordination of multiple individual contributors working in a specific area.
• Design and develop mechanical systems and components:
  • Understand how nuclear safety relates to system engineering and the work performed on a day-to-day occurrence.
  • Identify, collect, and document applicable requirements, interfaces, design basis and criteria by coordinating with key stakeholders/systems engineers and support identifying applicable industry codes and standards.
  • Create and maintain CAD-generated engineering models.
  • Perform computations and analyses for thermal and hydraulic systems as required to ensure SSCs can meet technical requirements.
  • Write and develop design documentation including, but not limited to, design basis documents, technical reports, calculations, design descriptions and drawings in accordance with applicable procedures.
• Perform Systems Engineering processes for the designed mechanical systems and components:
  • Demonstrate project management skills to effectively organize and lead external engineering partners.
  • Develop the technical content for and support the procurement of material, equipment, and services.
  • Review system engineering documentation from other systems for technical correctness and compliance with X‑energy processes and procedures and participate in design reviews for other systems.
  • Actively support the safety culture and ensure integration of quality in all System Engineering processes by complying with the relevant requirements of the Quality Assurance Program.
  • Identify, document, report and…