X-energy · 18 hours ago
Lead, Reactor Physics
Rockville, MD
Full-time
Hybrid
Senior Level, Lead/Staff
$139K/yr - $231K/yr
7+ years expX-energy is a company focused on advanced nuclear technologies, and they are seeking a Lead in Reactor Physics to provide management and technical oversight to a team of nuclear engineers. The role involves directing work, supporting resource management, and conducting analyses of nuclear reactors and facilities.
Clean EnergyCleanTechEnergyNuclearRenewable Energy
Responsibilities
Support the execution of the design, analysis, or evaluation in assigned projects using sound engineering principles and adhering to business standards, practices, procedures, and product / program / project requirements
Possess technical experience and proven expertise in one or more of the following areas: Reactor core design and analysis. Radiation shielding design and analysis. Nuclear fuel analysis and qualification. Criticality safety. Reactor multiphysics analysis, especially pertaining to transient analysis. Nuclear analysis software development, verification and validation. Other areas of nuclear engineering or nuclear physics relevant to the design and analysis of small modular reactors, microreactors, and nuclear facilities
Support the management of engineering resources across multiple projects and ensure qualified engineers are performing assigned work
Lead design cycle sprints and provide direction to ensure the convergence of efforts of engineering team members, partners, and suppliers to ensure the successful delivery of high-quality engineering work products, on schedule and within budget as defined by the Project leadership
May manage engineering staff by ensuring they are meeting expectations and promoting their professional development
Influence and support the development of strategy, methodology and technical tools for the area of responsibility
Interpret internal and external business challenges and recommend best practices to improve products, processes, tools, or services
Use judgement to support decision making and the handling of complex tasks or problems in areas of operations, product management, technology, or engineering
Work within a multidisciplinary engineering team to create the next generation nuclear power plants
Perform work in accordance with design control procedures, ensuring thorough documentation of work, facilitation of internal and external design reviews, and control of product design configuration data
Maintain a professional demeanor and behavior at all times, in all forms of communication
Perform other duties as assigned by manager
Qualification
Required
Bachelor's degree in nuclear engineering or related technical discipline from an accredited university or college
Typically, seven years of engineering experience. Graduate degrees typically count as two plus years of experience
Support the execution of the design, analysis, or evaluation in assigned projects using sound engineering principles and adhering to business standards, practices, procedures, and product / program / project requirements
Possess technical experience and proven expertise in one or more of the following areas: Reactor core design and analysis, Radiation shielding design and analysis, Nuclear fuel analysis and qualification, Criticality safety, Reactor multiphysics analysis, especially pertaining to transient analysis, Nuclear analysis software development, verification and validation, Other areas of nuclear engineering or nuclear physics relevant to the design and analysis of small modular reactors, microreactors, and nuclear facilities
Support the management of engineering resources across multiple projects and ensure qualified engineers are performing assigned work
Lead design cycle sprints and provide direction to ensure the convergence of efforts of engineering team members, partners, and suppliers to ensure the successful delivery of high-quality engineering work products, on schedule and within budget as defined by the Project leadership
May manage engineering staff by ensuring they are meeting expectations and promoting their professional development
Influence and support the development of strategy, methodology and technical tools for the area of responsibility
Interpret internal and external business challenges and recommend best practices to improve products, processes, tools, or services
Use judgement to support decision making and the handling of complex tasks or problems in areas of operations, product management, technology, or engineering
Work within a multidisciplinary engineering team to create the next generation nuclear power plants
Perform work in accordance with design control procedures, ensuring thorough documentation of work, facilitation of internal and external design reviews, and control of product design configuration data
Maintain a professional demeanor and behavior at all times, in all forms of communication
Perform other duties as assigned by manager
Preferred
Experience with Reactor Physics codes and methods (MCNP, SCALE, SERPENT)
Experience with NQA-1 in a nuclear environment
Previous Team Lead or Management experience preferred
Benefits
401K plan with an employer match
Medical/Dental/Vision Insurance
Life and Disability Insurance
Paid Time Off
Tuition Reimbursement/Professional Development policy
Company
X-energy
X-energy is a nuclear energy company that develops small modular nuclear reactors and nuclear fuels for clean energy generation.
501-1000 employees
H1B Sponsorship
X-energy has a track record of offering H1B sponsorships. Please note that this does not
guarantee sponsorship for this specific role. Below presents additional info for your
reference. (Data Powered by US Department of Labor)
Distribution of Different Job Fields Receiving Sponsorship
Represents job field similar to this job
Trends of Total Sponsorships
2025 (1)
2024 (1)
2022 (2)
2020 (1)
Funding
Current Stage
Late StageTotal Funding
$1.71BKey Investors
Stack CapitalJane Street CapitalPittco Management
2026-01-28Private Equity· $5M
2025-11-24Series D· $700M
2025-03-05Private Equity· $22.8M
Leadership Team
J. Clay Sell
Chief Executive Officer
Robert Taylor
Vice President, Regulatory Affairs and Licensing
Recent News
2026-01-16
MIT Technology Review
2026-01-13
Company data provided by crunchbase