X-energy LLC conducts a thorough recruiting process and will never issue offers without interview to discuss qualifications and responsibilities. All applications will be submitted via our company career page, www.x-energy.com/careers/. We will never ask you to provide payment information as part of the recruiting process. If anyone claiming to represent X-energy directs you in a manner otherwise, please contact us at www.x-energy.com/contact-us.

Job Description

Lead the Future of Clean Energy Manufacturing.

TRISO-X and X-energy are seeking a strong Project Engineer. TRISO-X is a first-of-its-kind nuclear fuel fabrication facility manufacturing TRISO coated-particle fuel.

The Project Engineer is the liaison between the Process Engineering group and the equipment suppliers. This is an intermediate engineering position responsible for planning, coordinating, and executing moderately complex technical and programmatic activities required to deliver engineering scope in support of project and program objectives, with growing independence. This role works across multidisciplinary teams to help ensure technical work products, schedules, interfaces, deliverables, and engineering execution activities are aligned with project requirements, business objectives, and applicable quality and regulatory standards. The Project Engineer contributes to technical integration, supports resolution of moderately complex issues, and assists in guiding project execution strategy with moderate latitude for independent judgment.

Nuclear experience is NOT required. We're looking for proven engineering leaders with strong technical judgment, team-building skills, and a passion for solving complex challenges.

Job Profile Tasks/Responsibilities:
Plan, coordinate, and execute moderately complex engineering scope in alignment with project objectives, schedules, budgets, and deliverable requirements, under the general guidance of senior engineers.
Provide technical inputs and support coordination of activities across multidisciplinary engineering teams and cross-functional partners, including project controls, licensing, supply chain, quality, safety, manufacturing, testing, operations, and construction.
Support resolution of moderately complex technical, programmatic, interface, and execution issues affecting scope, schedule, quality, and delivery performance for assigned scope, escalating highly complex issues to senior engineers.
Support and contribute to project engineering priorities, execution strategies, and integration plans to support timely and high-quality delivery of engineering work products.
Track engineering deliverables, interfaces, action items, decisions, assumptions, and technical issues for assigned scope to support disciplined project execution.
Support identification of technical, schedule, cost, and execution risks for assigned scope; assist in developing mitigation strategies; and support closure of routine issues in partnership with project and functional leadership.
Coordinate with internal and external stakeholders to help ensure technical requirements, deliverable expectations, design interfaces, and execution dependencies are understood and managed for assigned scope.
Support integration of assigned engineering work products into broader project execution plans and help ensure alignment with contractual, programmatic, customer, licensing, and regulatory requirements.
Participate in and help coordinate technical reviews, design reviews, status reviews, readiness reviews, and cross-functional planning activities for assigned scope to support decision-making and issue resolution.
Support development and maintenance of project engineering documentation for assigned scope, including engineering plans, interface management documentation, decision logs, risk registers, action tracking tools, and execution metrics.
Support and contribute to make/buy decisions, supplier technical coordination, subcontractor interfaces, and external partner execution activities as assigned.
Ensure activities are performed in accordance with applicable company processes, procedures, quality requirements, and regulatory expectations.
Actively support the safety culture and ensure integration of quality in all relevant processes by complying with the requirements of the Quality Assurance Program.
Provide feedback and informal guidance to less experienced team members, sharing knowledge related to project engineering best practices, execution standards, and integration methodologies, under the guidance of senior engineers.
Continue developing subject matter expertise in project engineering execution and contribute to continuous improvement of project delivery processes, tools, and standards.
Maintain professional demeanor and behavior at all times in all forms of communication.
Perform other duties as assigned by manager.

Job Profile Minimum Qualifications:

Bachelor’s degree in engineering, science, or related technical field from an accredited college or university.
For a Level III, typically, five to eight years of engineering, project engineering, technical program management, or related experience in the energy, nuclear, petrochemical, or high-technology hardware or software system development industry. Ten years or more for a Level IV.
Demonstrated experience supporting moderately complex technical scope and coordinating multidisciplinary engineering activities in a project-based environment.
Demonstrated experience supporting project execution activities, assisting with resolution of moderately complex cross-functional issues, and contributing to delivery across assigned project scope.
Working to strong knowledge of engineering design processes, project execution practices, interface management, schedule coordination, and technical documentation control.
Experience supporting projects in a regulated environment, including familiarity with quality assurance requirements, configuration management, and controlled technical deliverables.
Solid analytical, organizational, and problem-solving skills, with the ability to manage competing priorities within assigned scope.
Strong written and verbal communication skills, with the ability to communicate effectively with technical and non-technical stakeholders.

Location: 151 Lafayette Drive, Suite 300, Oak Ridge, TN

Work Site Expectations: 5 days in office

Travel: 10% potential

Hours: 8:00am-5:00pm, Mon-Fri

Compensation

As required by Maryland and other applicable state law, X Energy, LLC (X-energy) lists the expected compensation range for a publicly advertised job opportunity based upon the job requirements (e.g. education/training, experience, skill sets, etc.). Individual candidates who meet the job requirements for the posted position will be offered a salary within this range based on their respective levels of education/training, experience, and other qualifications unique to them. Salary ranges may vary based on the specific office location and region referenced in the posting to take into consideration differences in cost of living and may not be reflective of all regions. Please note that compensation ranges listed for US job postings reflect base salary only and do not include benefits or other incentives.

Offers within the posted salary range are commensurate with the individual’s qualifications for the position, along with a view on internal equity, market data, and room for growth. The salary range for this position is:

Level III: $110,000 to $135,000 / Level IV: $140,00 to $165,000

Position Job Classification

Full time - Exempt

Benefits

X Energy, LLC offers a robust benefits package that includes a 401K plan with an employer match, Medical/Dental /Vision Insurance, Life and Disability Insurance, Paid Time Off, and a Tuition Reimbursement/Professional Development policy that supports the continuing education of our employees.

An Equal Opportunity Employer.  All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, or protected veteran status and will not be discriminated against on the basis of disability.

X Energy, LLC participates in E-Verify. Please visit the links below for more information about E-Verify and the protection of your Right to Work.

Right To Work Link: If you have the right to work, don't let anyone take it away (e-verify.gov)

E-Verify Participation Link: E-Verify Participation Poster English and Spanish

About the company

X-energy designs and develops advanced nuclear reactors and fuel, aiming to commercialize small modular reactors based on a Generation IV high-temperature gas-cooled pebble-bed design and its TRISO-X fuel. The reactor uses ceramic-coated TRISO fuel in pebbles within a modular, sealed unit that operates at high temperatures to generate electricity or process heat, with safety features baked into the fuel and design. It differentiates itself by pursuing a specific Generation IV high-temperature gas-cooled, pebble-bed, TRISO-X fuel approach in a modular platform backed by significant financing to move toward commercialization. The company’s goal is to bring cleaner, safer nuclear energy to the market by completing design, obtaining regulatory clearance, and deploying its SMR technology and fuel at commercial scale.

Company Size

1,001-5,000

Company Stage

IPO

Headquarters

Rockville, Maryland

Founded

2009

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Simplify's Take

What believers are saying

DOE raised Seadrift support to $2.15 billion on August 13, 2026.
NRC issued Long Mott's FONSI in August 2026, clearing a major permitting hurdle.
X-energy expanded Gaithersburg to 145,000 square feet, signaling hiring for commercialization and manufacturing.

What critics are saying

Waterkeeper's NRC financial-qualifications challenge remains live; denial kills Long Mott's first commercial project.
Dow's 4,500-job layoffs and $2.15 billion cost-share expose financing fragility through 2026.
NRC safety review still runs through November 2026; any delay pushes commercial revenue beyond 2030.

What makes X-energy unique

Xe-100 runs helium-cooled, 750°C reactors for industrial steam, not just electricity.
TRISO-X fuel and graphite supply agreements lock safety-critical manufacturing around proprietary reactor design.
Dow, Amazon, and Centrica pipeline spans 11-plus gigawatts across industrial and AI demand.

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Benefits

401(k) Retirement Plan
Health Insurance
Dental Insurance
Vision Insurance
Paid Time Off
Tuition Reimbursement/Professional Development

Growth & Insights and Company News

Headcount

6 month growth

1 year growth

17%

2 year growth

16%

TechCrunch

Oct 19th, 2026

Amazon backs 960MW Indiana nuclear plant with 12 X-energy reactors on former coal site

Amazon will fund a proposed 960-megawatt nuclear plant in Indiana and be the first customer to buy its power, the companies announced Monday. American Electric Power (AEP) would operate the plant, and X-energy, a designer of small modular nuclear reactors, would supply 12 Xe-100 reactors. The plant would sit on the site of a demolished coal plant just south of Terre Haute. It would connect to the public grid, though Amazon says the power would also serve its data centres. The deal is the second between Amazon and X-energy, and three times larger than the first. Amazon led a $700 million Series C-1 round in X-energy in October 2024. The companies plan 5 gigawatts of new US nuclear capacity by 2039. The timeline depends on X-energy delivering its first plant, at Seadrift in Texas, where it has yet to break ground.

Epium Ltd

Oct 7th, 2026

X-energy targets industrial heat with helium-cooled reactors.

X-energy targets industrial heat with helium-cooled reactors. X-energy is developing the Xe-100, a small modular reactor designed to serve industrial manufacturers that need high-temperature heat for concrete, glass, steel, chemicals, plastics and fertilizers. Unlike traditional water-cooled nuclear plants, the Xe-100 would use helium gas as a coolant, allowing higher operating temperatures and lower pressures. The system would produce super-heated steam for direct industrial use, electricity generation of 80 megawatts (MW), or both. The reactor would use TRISO fuel pebbles that are designed to resist corrosion and melting, with fuel continuously moving through the reactor before being recycled or removed as waste. X-energy says the design is intrinsically safe because rising internal temperatures would naturally slow and stop the nuclear reaction. Industrial heating accounts for 18 percent of annual global greenhouse-gas emissions, making high-temperature processes a major target for decarbonization. The Xe-100 could also serve oil production, refining, data centers and electricity markets. X-energy says up to 12 reactors could be clustered to provide 24/7 on-site power. Major hurdles remain: commercial helium-cooled generation has struggled in China, SMR economics are unproven, and the Xe-100 might produce 10 times the spent fuel volume per unit of energy as existing reactors. A TRISO-X fuel factory is due in 2028, while projects with Dow, Amazon and a planned UK fleet target operation in the 2030s. Originally reported by technologyreview.com Read the source

NetDynamic Web Services

Oct 7th, 2026

X-energy's helium-cooled reactors: A new era in energy.

X-energy's helium-cooled reactors: A new era in energy. X-energy is pioneering the development of small modular reactors (SMRs) specifically designed to cater to industries with substantial energy demands, such as concrete, plastics, chemicals, and fibers manufacturing. These sectors require significant amounts of high-temperature heat, which traditional renewable sources like solar panels and wind turbines cannot adequately provide. Often, heavy industrial processes rely on fossil fuels to meet their thermal needs, making a transition to cleaner alternatives essential. Conventional nuclear reactors have limitations due to their reliance on water for cooling, which restricts their operating temperatures. X-energy's innovative Xe-100 reactor addresses this challenge by utilizing helium gas as a coolant. This approach not only allows for higher operational temperatures but also reduces the pressure requirements compared to traditional water-cooled systems. The Xe-100 can produce super-heated steam to directly supply heat or generate approximately 80 megawatts (MW) of electricity, marking a significant step forward in nuclear technology. The Xe-100 reactor employs advanced TRISO (tristructural-isotropic) fuel technology, known for its resilience against corrosion and melting. This fuel is continuously added to the reactor, ensuring a consistent energy output while also promoting safety. In case of power loss, the reactor's design inherently mitigates risks by slowing down the nuclear reaction. Beyond conventional industrial usage, the Xe-100 can also benefit sectors like oil recovery - notably in tar sands extraction - by providing the necessary heat without relying on extensive natural gas supplies. Despite the promising technology, challenges remain for X-energy. The only existing commercial helium-cooled reactors are in China, where operational issues have been reported. X-energy asserts that its vertically integrated fuel supply will lead to reliable performance over a projected reactor lifespan of 60 years. However, economic viability is still unproven; costs associated with SMRs can be significantly higher than solar energy. Additionally, while TRISO technology enhances safety and nonproliferation efforts, it may generate more nuclear waste than traditional reactors. Looking ahead, X-energy is making strides in regulatory compliance, having received a fuel fabrication license for its TRISO-X pebbles, with its first production facility slated for completion in 2028. The company is also pursuing projects to deploy the Xe-100 reactor to power a Dow chemical facility in Texas, which could become operational by the early 2030s. Concurrently, X-energy is collaborating with Amazon to develop a cluster of four Xe-100 reactors in Washington, along with a larger fleet in the UK, both targeting electricity generation in the next decade.

Electricity Info

Sep 28th, 2026

GE Vernova vs x-energy.

GE Vernova vs x-energy. 28th September 2026 Gas turbines have driven much of GE Vernova's recent growth. But the company offers power solutions beyond gas, including a light-water small modular reactor (SMR), the BWRX-300, which its subsidiary manufactures in partnership with Hitachi. Its SMR is a boiling-water nuclear reactor that uses low-enriched uranium (LEU), which is commonly used in traditional reactors. X-Energy is developing its own SMR, the Xe-100, which uses helium gas for cooling instead of water. By using helium gas, the Xe-100 can reach temperatures up to 750 degrees celcius, making it useful for industrial processes such as hydrogen production, chemical manufacturing, and desalination. In addition, the Xe-100 uses tri-structural isotropic (TRISO) pebbles for fuel, which have been called "the most robust nuclear fuel on Earth" by the U.S. Department of Energy. Motley Fool 27th Sept 2026 read more"

MoCoShow

Sep 26th, 2026

X-energy expands Gaithersburg headquarters to 145,000 square feet.

X-energy expands Gaithersburg headquarters to 145,000 square feet. Published September 26, 2026 at 1:00PM X-energy has expanded its planned Gaithersburg headquarters at Washingtonian Center, adding approximately 24,000 square feet to its footprint at 9801 Washingtonian Boulevard. According to Maryland Newsletters, X-energy has taken another floor at the building, which has been rebranded as Waterfront at Washingtonian. The expansion brings the clean energy company's total footprint to approximately 145,000 square feet in the nearly 315,000-square-foot building. The additional space comes after X-energy's lease was already among the area's largest office deals of 2025. In July 2025, X-energy announced plans to consolidate its two Rockville offices into a new headquarters at Washingtonian Center. At the time, the company said the headquarters would encompass approximately 125,000 square feet. X-energy, which specializes in nuclear reactor and fuel design technology, said the move would retain 260 full-time jobs in Montgomery County while creating more than 525 new positions over six years. The company's expansion has also helped fill space previously vacated by major tenants at 9801 Washingtonian Boulevard. According to Maryland Newsletters, the departures of Sodexo, which relocated to Pike & Rose, and Covance had left approximately half of the building vacant. Landlord Prime US REIT has since backfilled much of that space. Montgomery County Economic Development Corporation worked with X-energy ahead of the company's decision to remain and expand in Montgomery County, assisting with local incentive programs, property options, workforce resources and connections with local partners. "We're excited that X-energy is doubling down on Montgomery County," County Executive Marc Elrich said when the headquarters project was announced last year. "This expansion is a win for our residents, bringing hundreds of good-paying jobs and strengthening our position as a center for innovation in clean energy and advanced technology." In addition to its growing Gaithersburg headquarters, X-energy announced plans for a 90,000-square-foot facility in Frederick dedicated to non-nuclear testing and prototyping of advanced reactor components. X-energy was founded in Maryland and CEO J. Clay Sell said when the projects were announced that the company was entering "a period of unprecedented growth."

X-energy

Project Engineer

About the job