X-energy · 10 hours ago
Senior Test Engineer, Materials
Rockville, MD
Full-time
Hybrid
Senior Level
$135K/yr - $225K/yr
7+ years expX-energy is a company focused on advancing nuclear technology and testing. The Senior Test Engineer will provide technical leadership and management support for nuclear technology advancement and testing, directing the work of individual contributors, and ensuring successful test execution and evaluation.
Clean EnergyCleanTechEnergyNuclearRenewable Energy
Responsibilities
Develop and enact standard processes and best practices associated with technology maturation, test planning and execution
Support the execution of the test activities of assigned projects using sound engineering principles and adhering to business standards, practices, procedures, and product / program / project requirements
Lead testing activities and provide direction to ensure the convergence of efforts of engineering team members, partners, and suppliers to ensure the successful delivery of high-quality test engineering work products are on schedule and within budget as defined by the Project leadership
Engage Universities, Private Contractors, National Labs, and internal X-energy assets to perform experimentation and testing to obtain required useful information
Manage a team who designs and operates testing facilities
Create and implement test plans
Procure material and facilities
Review test output data
Create reports based on findings
Support engineering resources utilization across multiple assignments and ensure qualified engineers are performing assigned work
Help manage test engineering staff by ensuring they are meeting expectations and promoting their professional development
Support high level decision making and handling complex tasks or problems in areas of operations, product management, technology, or engineering
Assesses quality of information given and asks pertinent questions to stakeholders
Offers new solutions to problems outside of set parameters and can construct and provide recommendations
Ensure testing activities are performed in accordance with Quality Assurance requirements
Maintain 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 mechanical, electrical, or nuclear engineering or related discipline from an accredited university or college
Typically, seven plus years of professional experience in engineering after completion of undergraduate study. Graduate degrees typically count as two plus years of experience
Hands on experience with hardware development, testing and experimentation
Demonstrated experience with design of experiment and test planning
Experience working under a formal quality assurance framework such as ISO 9000, ASTM or NQA-1
Leadership experience on hardware and testing related projects
Preferred
Creep-fatigue (metals), Creep graphite
Stress-corrosion cracking, high-temperature oxidation and corrosion
He-implantation
metal and graphite materials irradiation
materials characterization (SEM-EDS, TEM, XRD, XPS, etc.)
Familiarity with relevant ASME and ASTM standards
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