X-energy · 2 months ago
Engineer II-III, Reactor Physics Methods
Rockville, MD
Full-time
Onsite
Mid, Senior Level
$98K/yr - $163K/yr
3+ years expX-energy is a company focused on nuclear engineering and reactor design. They are seeking an Engineer II-III to perform engineering tasks associated with designing, developing, and analyzing nuclear reactors or facilities, collaborating with internal and external design teams, and executing nuclear engineering assignments.
Clean EnergyCleanTechEnergyNuclearRenewable Energy
Responsibilities
Perform design, analysis, and evaluation in assigned projects using sound engineering principles and adhering to business standards, practices, procedures, and product / program requirements
Collaborate in planning, scheduling, and organizing detailed phases of engineering work
Collaborate in the technical oversight and direction of internal or external design teams
Facilitate and assist in the assessment of customer needs and capture requirements and functions related to nuclear engineering
Execute nuclear engineering assignments with clear and specified objectives; utilize conventional specifications and/or Interface Control Documents and plans
Recommend system design alterations and enhancements to improve quality of products and/or procedures from an assembly, transportation, construction, commissioning, operations, maintenance, and/or decommissioning perspective
Lead reviews and presentations for internal company design reviews and customer design reviews regarding nuclear design
Organize engineering efforts in assigned areas between specialty and other engineering groups or disciplines, with the client, suppliers, contractors, or other groups as required
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 degree from an accredited institution
Level II: Typically, three years of experience in an engineering role
Level III: Typically, five years of experience in an engineering role
A master's degree in engineering or related field (may include a combination of experience obtained through an academic institution, e.g., design projects, research, or design teams, as well as professional experience) may be in lieu of two years of experience
A Ph.D. in engineering or related field (may include a combination of experience obtained through an academic institution, e.g., design projects, research, or design teams, as well as professional experience) may be in lieu of three years of experience
Previous experience at X-energy exceeding performance standards may be in lieu of years of experience
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
Preferred
Experience working with Git, GitLab, or other software repository tools
Experience writing code in C, C++, Fortran, Julia, Python, or other similar languages
Familiarity and experience with reactor physics methods development
Benefits
401K plan with an employer match
Medical/Dental /Vision Insurance
Life and Disability Insurance
Paid Time Off
Tuition Reimbursement/Professional Development policy that supports the continuing education of our employees
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
Jane Street CapitalPittco ManagementDepartment for Energy Security & Net Zero
2025-11-24Series D· $700M
2025-03-05Private Equity· $22.8M
2024-10-16Series C· $700M
Leadership Team
J. Clay Sell
Chief Executive Officer
Robert Taylor
Vice President, Regulatory Affairs and Licensing
Recent News
2026-01-06
Crunchbase News
2025-12-17
Company data provided by crunchbase