Jobs at X-energy

Lead development of rapid cost/value estimating, embed cost-conscious decision-making across engineering and project teams, build tools/processes for real-time trade-off analysis, monitor budgets/forecasts, and challenge over‑engineering to optimize whole‑life value for large energy megaprojects.

Lead international market development and policy workstreams to advance X-energy's nuclear technologies. Develop market strategies, shape domestic and international policy, engage governments, NGOs, and finance institutions, represent the company in policy forums, support congressional and executive outreach, and coordinate international partner visits. Report to the Senior Director.

The Subcontracts Administrator will oversee the life cycle of subcontracts, including negotiation, compliance, and communication with vendors and clients. Responsibilities include preparing contracts, conducting due diligence on vendors, and upholding communication with internal teams regarding contract administration.

Lead design and execution of cybersecurity engineering for plant design, build an ICS lab, install/harden and administer OT systems, deploy SIEM/EDR/NDR, perform advanced threat hunting, develop threat intelligence, run risk assessments, integrate security tools, and develop ServiceNow integrations and security workflows.

Perform probabilistic risk assessments and safety analyses per industry standards, develop and maintain PRA models (event/fault trees), author and review technical documentation, use PRA software to inform design and licensing, collaborate with engineering and regulators, and provide technical guidance on complex safety issues.

Design and analyze in-core shielding and reactor vessel internals from concept through testing and commissioning. Create CAD models, perform structural/thermal calculations, ensure manufacturability, comply with nuclear codes/quality, and support V&V and documentation.

Lead the mechanical design of advanced nuclear reactor systems, manage engineering teams, develop best practices, and drive innovation in heat exchanger technology.

Responsible for the design, integration, and management of complex nuclear systems using systems engineering processes and frameworks, ensuring project requirements are met.

Lead design and delivery of ERP and non-ERP system integrations and master data flows for TRISO fuel fabrication. Document architectures, integration patterns, error handling, and reconciliation. Ensure integration designs meet NRC/DOE/ITAR/NQA-1 compliance, coordinate with Quality, Operations, Engineering, and vendors, and serve as primary integration liaison between TRISO-X teams and corporate IT.

This role manages the supply chain process, liaises with suppliers, develops strategic plans, negotiates contracts, and ensures project goals are met.

The Engineer V, Configuration oversees the integrity and traceability of engineering baselines, ensuring proper documentation and change management across teams.

The Mechanical Systems Design Engineer will design and develop mechanical systems for nuclear products, ensuring safety and functionality through various engineering analyses and CAD modeling.

Lead end-to-end systems engineering for complex nuclear fuel production systems using MBSE and INCOSE-aligned processes. Manage requirements, interfaces, configuration baselines, V&V (RVTM, test plans, FAT/SAT), and cross-discipline integration to meet NRC/DOE standards. Develop engineering procedures, perform risk assessments, and guide junior engineers while coordinating with stakeholders using JAMA and JIRA.

Administer and support enterprise content management applications, manage configuration and access controls, install upgrades and patches, troubleshoot operational issues with vendors and development teams, ensure performance and availability, document processes, and lead platform improvement and integration projects.

Manage multiple IT projects for engineering systems (Teamcenter, NX CAD, PLM) using Agile. Scope, plan, schedule, track budgets/risks, coordinate vendors, DevOps, procurement, compliance, and reporting while ensuring project delivery and continuous improvement.

Responsible for the design and development of mechanical systems for nuclear applications, including prototyping and testing, while ensuring compliance with technical specifications and industry standards.

The Project Controls Engineer III provides support in planning, scheduling, cost management, and risk analysis for projects, ensuring alignment with project goals and metrics.

Manage and administer the Corrective Action Program (CAP), review and classify condition reports, monitor CAP metrics, verify corrective/preventive action effectiveness, support Corrective Action Review Board, drive closure of nonconformances, perform assessments and continuous improvement, and provide regular progress reporting to management.

The Systems Engineer III-VI will manage systems engineering processes for nuclear systems, ensuring design integration, requirement management, and documentation throughout system lifecycles.

Serve as trusted advisor to the SVP of Global Business Development, owning executive operations, organizational alignment, strategic planning, KPI tracking, budget interface, and cross-functional process improvements. Lead strategic planning, design scalable tools and playbooks, support capture automation and AI adoption, prepare executive and board materials, and drive accountability across business development functions.