Jobs at X-energy

Develop and execute supply chain strategies for advanced nuclear fuel and reactor programs. Identify, qualify, and manage equipment and service suppliers; create category and project execution plans; analyze spend, risk, market conditions, costs, and schedules; negotiate supplier contracts and strategic agreements; review technical and quality requirements; coordinate supplier QA qualification; monitor supplier performance; manage delivery schedules; and provide commercial and contracting guidance across business units.

Provides project quality assurance for X-energy’s reactor development programs. Establishes and maintains quality management processes, analyzes nonconformances, implements corrective actions, supports inspections and supplier audits, delivers quality training, and reports program risks. Owns project quality plans and serves as the quality point of contact. Ensures compliance with nuclear, DOE, Canadian, international, and ISO requirements while promoting safety and quality culture. The role requires domestic and international travel to supplier and customer sites.

Designs and analyzes mechanical structures, systems, and components for terrestrial and space-based advanced nuclear reactors. Responsibilities include CAD modeling, structural hand calculations, FEA support, design for manufacturability, prototype testing, and cross-disciplinary coordination. The engineer maintains configuration-controlled models in Teamcenter, develops analysis plans, and supports integration of reactor components such as pressure vessels, heat exchangers, core structures, and transportation packages.

Implement supply chain processes and act as primary liaison with suppliers and stakeholders. Develop strategic and project-specific procurement plans, perform category spend and risk analysis, negotiate and manage contracts, ensure technical and QA requirements, monitor supplier performance, and support business development to meet schedule and cost objectives.

Design and draft 3D models and 2D drawings for reactor/SMR plant equipment, piping, and systems; create PFDs, P&IDs, isometrics; ensure manufacturability, maintain PLM/PDE models, resolve interferences, prepare manufacturing drawings and BOMs, coordinate with engineers, lead small design teams, and mentor junior designers.

Plan, develop, and execute test programs for advanced reactor technologies. Coordinate with systems engineers, design test hardware and facilities, oversee fabrication/installation/commissioning, supervise test execution, document results, and liaise with vendors. Provide in-person test oversight and support lifecycle of test hardware.

Design and develop mechanical systems and components for the Xe-100 reactor (reactor internals, steam generators, graphite core components), perform analyses and hand calculations, create CAD models and documentation, assess manufacturability, support testing/prototyping, and ensure compliance with codes and quality procedures.

The Mechanical Design Engineer will develop mechanical systems and components for nuclear reactors, performing analyses and supporting design, prototyping, and testing processes.

The role provides management support and technical leadership in mechanical engineering, overseeing teams in mechanical design, structural analysis, and thermal systems for advanced reactor plants.

Develops production-ready AI-native applications, agentic workflows, and cloud infrastructure supporting nuclear engineering. Responsibilities may focus on full-stack development, agentic AI, data and systems integration, or platform infrastructure and DevOps. The role involves LLMs, AWS services, engineering data platforms, digital-thread workflows, regulated software quality, system integrations, documentation, testing, and collaboration with systems engineering, licensing, and quality teams.

Leads systems engineering lifecycle activities for complex nuclear systems, including stakeholder and operational analysis, requirements management, architecture modeling, interface management, integration, verification, and validation. Develops system behavior models using MBSE and PLM tools, manages technical risks, supports value engineering, produces engineering documentation, and guides junior engineers. Collaborates across disciplines while following quality management and assurance procedures.

The Software Engineer III role focuses on enhancing the APEX platform through stakeholder training, support, and direct engagement, along with hands-on product engineering and development tasks leveraging agentic AI workflows.

Build production-ready AI-native applications, agentic workflows, cloud infrastructure, data platforms, integrations, and DevOps systems supporting nuclear engineering workflows. Responsibilities may span front-end/full-stack development, agentic AI, data and systems integration, or platform infrastructure. The role partners with systems engineering, licensing, and quality teams, documents architectures, maintains development and QA standards, and supports reliable, compliant delivery in a hybrid environment.

Develop production-ready AI-native applications, agentic workflows, and cloud infrastructure supporting nuclear engineering workflows. Responsibilities may span React full-stack development, AWS Bedrock agent architectures, RAG and Graph-RAG, engineering data lakehouses and integrations, or platform infrastructure and DevOps. The role includes collaborating with systems engineering, licensing, and quality teams; documenting architecture; implementing testing, security, governance, and CI/CD practices; and supporting regulated engineering applications under general supervision.

Administer and support SAP Ariba and SAP Concur platforms including modules, user access, integrations with ERP, reporting, performance monitoring, upgrades, vendor support, and documentation. Collaborate with infrastructure and development teams, lead improvements, and support business transactions and compliance.

Program, set up, operate, and maintain advanced CNC equipment to produce high-precision components. Develop CAM programs, design fixtures, perform multi-axis machining, inspect parts with precision tools (including CMM), document processes, troubleshoot equipment, and collaborate with engineering to improve manufacturability and automation.

Develop and analyze mechanical systems, structures, and components for nuclear reactors using CFD and engineering calculations. Create, verify, and validate CFD models, perform heat transfer/fluid/particulate analyses, produce design documentation, and support manufacturability, testing, and licensing activities. Lead or contribute across project phases and provide technical reviews.

Oversee test planning, development, and execution for advanced reactor technologies, ensuring compliance and technical completeness throughout the testing lifecycle.

The Senior Manufacturing Engineer will design mechanical systems, ensure compliance with specifications, mentor junior staff, and manage development processes for nuclear components.

This role oversees software development and qualification in safety analysis, ensuring compliance with QA procedures and regulatory standards, while leading teams in complex technical projects.