Jobs at X-energy

This role involves guiding the design and specification of tanks and pressure vessels, performing design calculations, and ensuring compliance with technical specifications and industry standards. The specialist will provide expertise, conduct independent reviews, and manage documentation while mentoring junior team members.

Oversee customer relationship management, develop business strategies, track communications, and maintain industry awareness while coordinating customer engagement activities.

Lead implementation of supply chain processes, source and manage suppliers, develop category and project-specific procurement plans, negotiate contracts, ensure supplier performance and QA compliance, and support commercial strategy for large nuclear construction projects.

The Test Engineer is responsible for planning, developing, and executing test activities for reactor technologies, coordinating with engineers, overseeing test lifecycle, and documenting results.

This role involves designing and selecting heat exchangers for mechanical processes, providing expert recommendations, and supervising engineering documentation and compliance with industry standards.

Support design, installation, operation, and optimization of graphite and fuel manufacturing processes. Translate lab processes to production, develop equipment specs, ensure safety and regulatory compliance, monitor production, troubleshoot variances, and support waste permitting and chemical/material handling.

Provide administrative and managerial support, manage calendars, prepare reports, handle communications, and assist with office functions.

Designs and implements cybersecurity strategies for plant OT and ICS environments, builds and hardens lab and production systems, operates threat hunting and intelligence, manages SIEM/NDR/EDR and endpoint detection, conducts risk assessments, produces incident and trend reports, and develops ServiceNow integrations and workflows.

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.

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 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.

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.

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.

Responsible for executing systems engineering processes for nuclear systems' design, integration, and management. Ensure system components meet requirements within established MBSE frameworks while managing documentation and project communication.

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.

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.

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

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.