Nuclear Software Engineering Manager
About the job
- A bachelor's degree in engineering, computer science, or a related discipline from an accredited university or college is required.
- Typically, ten years of engineering experience are required; graduate degrees typically count as more than two years of experience.
- Experience with analysis software verification and validation is required.
- Experience using or developing analysis software under a heavily regulated quality assurance regime, such as nuclear systems design, nuclear safety analysis, flight control software, safety-related industrial controls, or computer software used to control plant systems, structures, and components, is required.
- Support delivery of internally developed analysis software, including installation files, documentation, testing, and user support, to engineers performing analysis.
- Support delivery of verification and validation documentation and Commercial Grade Dedication packages for all relevant analysis software.
- Control and maintain analysis software in accordance with the Quality Assurance program implementing NQA-1 and other relevant standards.
- Support project managers and leads in developing analysis software.
- Support execution of project plans for each area.
- Partner with appropriate managers to ensure sufficient staffing, resourcing, and recruitment for supporting software services.
- Collaborate with appropriate team members to ensure validation covers design requirements specified for full code qualification.
- Work with appropriate managers to ensure alignment of requirements.
- Act as the single point of contact for software services contractors.
- Support management of contractor performance, acceptance, and quality assurance of work products.
- Manage execution and periodic updating of the Quality Assurance Program's software procedures.
- Perform other duties as assigned by the manager.
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
6 month growth
6%1 year growth
17%2 year growth
16%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
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.
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"
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."
XE stock slides as price action diverges from strong cash position. TIM BOHEN - UPDATED SEP. 9, 2026, 12:32 PM ET X-Energy Inc. stocks have been trading down by -10.03 percent after reports of major project delays and financing concerns. Key takeaways. * XE has faded from an early high near $18.91 to close around $17.23, signaling profit taking and short-term selling pressure. * X-Energy Inc. posts roughly $94.26M in annual revenue but runs very heavy losses, with profit margins deeply negative. * A massive cash pile over $1.07B, minimal debt, and a current ratio above 17 give XE a long financial runway. * Intraday XE trading shows tight consolidation around $17.20, hinting at a potential base or continuation move. * With a price-to-sales ratio above 50, traders are clearly paying up for X-Energy Inc.'s growth narrative, not current profits. Live Update At 12:31:51 EDT: On Wednesday, September 09, 2026 X-Energy Inc. stock [NASDAQ: XE] is trending down by -10.03%! Discover the key drivers behind this movement as well as its expert analysis in the detailed breakdown below. Quick financial overview. XE is a classic high-expectation story stock. X-Energy Inc. generates about $94.26M in revenue, but the company is nowhere near breakeven. Profit margins sit around -225%, and both return on assets and return on equity are firmly negative. That tells traders XE is still in heavy build-out mode rather than cash-harvesting mode. At the same time, XE's balance sheet is unusually strong for a loss-making name. X-Energy Inc. finished the latest quarter with roughly $1.15B in cash and $1.64B including short-term investments. Long-term debt is only about $24.93M. The current ratio is a huge 17.2, and the quick ratio is 16.1, which means XE can cover its short-term obligations many times over. The flip side is valuation. With a market value implied by an enterprise value near $6.17B and price-to-sales around 54.6, traders are paying a premium for future potential. X-Energy Inc.'s book value per share is about $4.47, while XE trades several times above that, signaling strong faith in the long-term story despite current losses. Why traders are watching XE price action. On the chart, XE is not trading like a sleepy value play. X-Energy Inc. has been swinging between the high teens and low 20s over the last several sessions. The recent high near $22.28 was followed by a grind lower: multiple closes in the $18-$19 zone, and now a sharper pullback to $17.23. That's the kind of retrace that gets active traders locked in on support levels and risk control. Look at the latest daily candle. XE opened at $18.33, pushed to $18.91, then reversed and closed near the low of the day. That intraday rejection from the highs shows sellers hit the tape hard. For short-term traders, X-Energy Inc. is now in "prove it" territory - it needs to hold the mid-$17s or risk a deeper flush back toward prior base zones. Zooming into the 5-minute chart, the morning session in XE showed a quick pop above $18 followed by a series of lower highs. By midday, price settled into a tight band between about $17.17 and $17.38. That kind of intraday compression after a drop often sets up the next move. Either X-Energy Inc. will bounce toward $18 on a relief push, or a break under $17.10 can open the door to more downside. For traders who thrive on volatility and clear levels, XE is delivering both. The story - high cash, high valuation, heavy losses - adds fuel to the moves because sentiment can flip fast. When hope is priced in, every breakout and breakdown in X-Energy Inc. matters more. Conclusion. XE sits at the crossroads of hype and hard numbers. On one side, X-Energy Inc. sports over $1.07B in cash, very low debt, and enough liquidity to fund years of operations at current burn rates. On the other side, XE is losing serious money, with negative EBITDA of about $58.45M for the latest quarter and a free cash outflow of roughly $160.62M. The market is clearly paying today for what it expects X-Energy Inc. to become tomorrow. For traders, that gap between present reality and future promise is exactly where opportunity lives - and where risk spikes. XE's price-to-sales multiple above 50 and price well above book value tell you sentiment is still bullish on the long-term story. But the recent drop from the low-$20s to the mid-$17s shows how quickly that sentiment can swing. In a tape this volatile, it's easy to chase strength or panic on weakness, but as Tim Bohen, lead trainer with StocksToTrade says, "Time and experience have taught me that missed opportunities are part of the game. There's always another setup around the corner." That mindset can help traders avoid forcing trades in XE when the risk/reward just isn't there. Active traders in XE should focus on clean technical levels, the intraday trend, and the company's runway. X-Energy Inc.'s fat cash stack means dilution and credit stress are less urgent, giving more room for the chart to drive short-term trading. As Tim Sykes likes to say, "The market doesn't owe you anything - it just rewards those who prepare." For XE, that preparation means knowing the numbers, respecting the volatility, and cutting losses fast when the trade breaks. This is stock news, not investment advice. StocksToTrade News delivers real-time stock market updates tailored to highlight the key catalysts driving short-term price movements. Its coverage is designed for active traders and investors who thrive in fast-moving markets, with a focus on volatile sectors like penny stocks, AI stocks, Robinhood stocks and other momentum plays. 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