Engineer IV, Plant & Process Design

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

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

• Design and develop mechanical systems and components:
  • Understand how nuclear safety relates to system engineering and the work performed on a day‑to‑day basis.
  • Identify, collect, and document applicable requirements, interfaces, design basis and criteria by coordinating with key stakeholders/systems engineers and supporting the identification of 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 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 manage system and project risks to ensure they are visible and mitigated accordingly.
• Perform work in accordance with X‑energy quality procedures for design and configuration management to ensure project quality requirements are met.
• Maintain professional demeanor and behavior at all times in all forms of communication.
• Lead the execution of the core tasks and responsibilities without close supervision and with latitude for independent judgment.
• Develop mechanical/physical system design concepts, design and support development of processes to create structures, systems, and components (SSCs). Plan and structure 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. Manage the system development including planning, monitoring, and controlling of the complete engineering effort through all development life cycle phases.
• Manage design development leads and subcontractors to define system and subsystem functional and physical architecture, critical design parameters, and descriptive drawings. Oversee documentation to applicable requirements, interfaces, design basis and criteria by coordinating with…