Full-Time

Nuclear Engineer

Posted on 10/31/2025

Aalo Atomics

Aalo Atomics

51-200 employees

Advanced nuclear technology licensing and deployment

No salary listed

No H1B Sponsorship

Austin, TX, USA + 1 more

More locations: Idaho Falls, ID, USA

In Person

US Citizenship Required

Category
Mechanical Engineering (1)
Requirements
  • MS or PhD in Nuclear Engineering, Mechanical Engineering, Physics, or related fields
  • At least 5-7 years of relevant industry or research experience in nuclear reactor design, computational modeling, or related fields
  • Hands-on experience with computational and analysis software such as Serpent, MCNP, OpenMC, MOOSE, BISON, TRANSURANUS, COMSOL, ANSYS, or similar
  • Demonstrated problem-solving abilities to innovate solutions for complex nuclear engineering challenges
  • Strong collaboration and communication skills, comfortable working in dynamic, multidisciplinary environments
  • Eligibility: U.S. citizenship, permanent residency, or citizenship from Department of Energy Part 810 authorized countries
Responsibilities
  • Develop and maintain computational models for reactor physics and thermal-hydraulic behavior using Serpent, MCNP, and OpenMC
  • Perform detailed subchannel thermal-hydraulic simulations to evaluate coolant flow dynamics and heat transfer within advanced reactor cores
  • Conduct shielding analyses employing sophisticated variance reduction techniques to ensure effective radiation protection
  • Leverage multi-physics platforms (Multiphysics Object Oriented Simulation Environment) to perform thermomechanical analysis of reactor components, evaluating stresses, deformation, and material performance under operational conditions
  • Implement uncertainty quantification methods to enhance model robustness and confidence in simulation outcomes
  • Partner closely with cross-functional teams across disciplines to drive innovation and problem-solving in reactor core and system design

Aalo Atomics develops and deploys advanced nuclear energy systems to provide reliable, low-carbon power. It licenses technology, forms partnerships, and runs energy production projects for governments, large corporations, and energy providers. The company relies on multidisciplinary R&D to bring nuclear solutions to market, drawing talent from computer hardware, software, aerospace, and automotive sectors and navigating regulatory approval as part of its business model. Unlike wind and solar, its products aim to deliver continuous electricity at competitive costs, supported by a diverse ecosystem of partners and clients. Aalo also focuses on public education about nuclear energy’s risks and benefits and to attract the next generation of engineers. Its goal is to usher in a second Atomic Age by delivering abundant, dependable clean energy to power humanity for generations.

Company Size

51-200

Company Stage

Series B

Total Funding

$133.3M

Headquarters

Austin, Texas

Founded

2023

Simplify Jobs

Simplify's Take

What believers are saying

  • Secured $100M Series B from Valor Equity Partners and Hitachi Ventures in 2025.
  • Partners with Baker Hughes, GNF, Urenco for turbines, fuel by early 2026.
  • Texas invests heavily, positioning Austin as nuclear manufacturing epicenter.

What critics are saying

  • DOE delays Aalo-X approval beyond July 2026, halting tests immediately.
  • NRC rejects sodium-cooled licensing plan in 18-36 months over safety issues.
  • Oklo deploys Aurora commercially in 2027, stealing Microsoft data center deals.

What makes Aalo Atomics unique

  • Aalo Atomics builds fully modular XMR nuclear plants purpose-built for AI data centers.
  • Aalo-X targets 2026 criticality as first US advanced reactor in decades at INL.
  • Aalo Pod delivers 50 MWe on under five acres with 98% reliability in 12 months.

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Benefits

Flexible Work Hours

Growth & Insights and Company News

Headcount

6 month growth

-3%

1 year growth

-5%

2 year growth

-6%
Business Wire
Mar 4th, 2026
Aalo Atomics selects Baker Hughes to supply 10 MWe steam turbine for experimental nuclear reactor

Aalo Atomics has selected Baker Hughes to supply a 10 MWe steam turbine generator set for Aalo-X, its experimental reactor at Idaho National Laboratory. The Austin-based startup builds modular nuclear plants designed to power AI data centres. Baker Hughes will deliver the turbine by the end of 2026. The collaboration began in the fourth quarter of 2025, combining Baker Hughes' power generation expertise with Aalo's advanced nuclear technology. The Aalo-X project has recently secured site allocation from the Department of Energy's Idaho Operations Office, broken ground, completed design reviews and received an Environmental Assessment Determination. Founded in 2023, Aalo has raised over $136 million from investors including Valor Equity Partners, 50Y and Hitachi Ventures.

Yahoo Finance
Mar 3rd, 2026
Aalo Atomics secures fuel fabrication contract with GNF for first US advanced reactor in decades

Aalo Atomics has signed a fuel fabrication contract with Global Nuclear Fuel, a GE Vernova-led alliance with Hitachi, to supply fabricated fuel rods for its sodium-cooled extra modular nuclear reactor. GNF will deliver uranium dioxide fuel rods made from low-enriched uranium in early 2026. The fuel rods will power Aalo-X, expected to be the first advanced reactor built in the US in over a generation, with criticality targeted for 2026. The Austin-based company is building nuclear reactors specifically to power AI data centres. Aalo has recently secured site allocation from the Department of Energy's Idaho Operations Office, broken ground at the INL test site, and received an Environmental Assessment Determination. The company has raised over $136 million from investors including Valor Equity Partners and Hitachi Ventures.

AlphaStreet
Jan 26th, 2026
Baker Hughes Reports Milestone Achievements and Record Backlog

Baker Hughes reports milestone achievements and record backlog. Baker Hughes (Nasdaq: BKR) concluded a transformative 2025, delivering exceptional financial results driven by record-breaking orders. Industrial & energy technology (IET) leading the charge. The IET segment secured several critical awards for global energy infrastructure. Key achievements include supplying liquefaction equipment for the Rio Grande LNG facility and Commonwealth LNG's export facility, utilizing high-efficiency aeroderivative gas turbines and compressor technology. Furthermore, Baker Hughes was selected to provide power generation equipment for Alaska LNG's North Slope gas treatment plant. Beyond LNG, the company demonstrated strength in power systems, receiving an award for over 40 BRUSH(TM) generators to deliver approximately 7 GW of power to the U.S. grid. In a significant move into new energy, Aalo Atomics selected Baker Hughes to supply a steam turbine generator for one of the first Small Modular Reactor (SMR) demonstration plants in North America. The digital portfolio also scaled significantly, with Cordant(TM) software awards from global partners like Yara and China National Petroleum Corporation. Oilfield services & equipment (OFSE) innovation. In the OFSE segment, the company secured nearly $1 billion in Production Solutions contracts in the Middle East. Notable awards came from the Kuwait Oil Company and Petroleum Development Oman, both of which will leverage the Leucipa(TM) automated field production solution to improve well reliability. Technological advancements in well construction were highlighted by the uptake of Lucida(TM) and AutoTrak(TM) rotary steerable systems in Argentina's Vaca Muerta formation, enabling deeper and more efficient drilling. Additionally, the company secured a multi-year agreement with Eni for subsea production systems at the Coral North LNG project offshore Mozambique, further expanding its long-cycle offshore footprint. Strategic outlook. CEO Lorenzo Simonelli noted that these achievements position Baker Hughes to evolve into a "stronger, more industrialized energy solutions company" as it enters its "Horizon Two" phase from 2026-2028. With a book-to-bill ratio of 1.1, the company enters 2026 with sustained momentum across its diverse portfolio

Business Wire
Dec 16th, 2025
Aalo Atomics Celebrates Robust Partner and Supply Chain Ecosystem Amid Shipment of First Aalo-0 Modules

Aalo Atomics celebrates robust partner and Supply Chain ecosystem amid shipment of first Aalo-0 modules. Aalo Announces New Supply Chain Partners at Aaloverse Summit in Austin as Company Approaches 2026 Criticality for Aalo-X (XMR) Nuclear Reactor AUSTIN, Texas-(BUSINESS WIRE)-Aalo Atomics, the company building fully modular nuclear plants (XMRs) to power modern AI data centers, today hosts its inaugural Aaloverse Summit, an event highlighting the company's robust supply chain and partnership ecosystem, as well as the shipment of the first five Aalo-0 modules to the company's test site in Idaho. The completed modules are key to unlocking the XMR concept and will be used as the Aalo-0 prototype, which will perform integral effects tests and produce steam at engineering scale from Aalo's reactor. The successful production of the Aalo-0 modules directly reflect Aalo's relentless focus on scalability, vertical integration and design for manufacturing and assembly principles. It is also a critical precursor to achieving criticality in 2026 and operating the Aalo-X (XMR) nuclear reactor. "The modules being shipped to our test site today showcase our factory's ability to transform raw materials into fully functional, standardized, nuclear power plant modules, while also achieving the economies of scale through production, the nuclear industry has previously lacked," said Yasir Arafat, co-founder and CTO of Aalo Atomics. "This first shipment is a testament to the diversity and strength of our supply chain partners who bring an unprecedented level of expertise to our production environment." The current Aalo supply chain ecosystem consists of more than 125 different suppliers representing over 35 U.S. states and six countries. Some supply chain and operational partners being highlighted at the Aaloverse event include: * Baker Hughes and Siemens - Aalo is partnered with these two industry-leading steam turbine generator suppliers, who can provide this necessary component for making power from the Aalo reactors * Dubose - Dubose is providing steel to Aalo for containment vessels and more * Flowserve - This leading provider of flow control products and services for the global infrastructure markets is providing Aalo with pumps, valves and seals * Microsoft, Nvidia and Idaho National Laboratory (INL) - Aalo is collaborating with Microsoft, Nvidia and INL to lay the groundwork for a digital super-operator platform that can transform how nuclear reactors of the future can safely operate with minimal operators * Paragon Energy Solutions - Paragon, a producer of mechanical, electrical, and I&C mission-critical equipment, is providing Aalo with instrumentation and controls * Urenco - Urenco will provide Aalo with fuel in the form of enriched uranium * GE - GE will fabricate Aalo's fuel pins for Aalo-X and beyond "Texas has made the nation's largest state investment in the advanced nuclear energy industry. Governor Abbott's vision is clear: Texas will become the epicenter of the American Nuclear Renaissance. Companies like Aalo Atomics are locating and innovating here in Texas because of our friendly regulatory environment, talented and skilled workforce, and the Texas entrepreneurial spirit," said Jarred Shaffer, Director, Texas Advanced Nuclear Energy Office (TANEO). "We look forward to seeing Aalo Atomics, as well as other Texas based companies and projects, achieve criticality next year and a continued partnership with the company for years to come as it continues to build and manufacture its Aalo reactors here in our great state." Aalo remains on track to achieve criticality by July 2026, ahead of operating the Aalo-X reactor, a 10MWe factory-built pilot power plant with modules assembled on site and precursor to Aalo's first commercial product, the Aalo Pod. Aalo continues to hit milestones weekly, with recent developments including signing an Other Transaction Agreement (OTA) and completing a Preliminary Design Review with the Department of Energy (DOE) and becoming the first company in the DOE Reactor Pilot Program to begin construction activities at the Idaho National Laboratory (INL). About Aalo Atomics Aalo Atomics, based in Austin, Texas, builds nuclear reactors to power modern AI data centers. Founded in 2023, Aalo has secured over $136M in funding to date from multiple investors, including Valor Equity Partners, 50Y, Fine Structure Ventures, Hitachi Ventures, NRG Energy, Vamos Ventures, Tishman Speyer, Kindred Ventures, Harpoon Ventures, Crescent Enterprises, Crosscut, Alumni Ventures, MCJ, Gaingels, and Nucleation Capital, among others. To learn more, visit www.aalo.com.

Business Wire
Sep 10th, 2025
Aalo Atomics Becomes First U.S. Nuclear Reactor Company with a Contract for Commercial Delivery of Enriched Uranium; Hits Crucial Next Milestone on Path to 2026 Startup

Founded in 2023, Aalo has secured over $136M in funding to-date from multiple investors including Valor Equity Partners, 50Y, Fine Structure Ventures, Hitachi Ventures, NRG Energy, Vamos Ventures, Tishman Speyer, Kindred Ventures, Harpoon Ventures, Crescent Enterprises, Crosscut, Alumni Ventures, MCJ, Gaingels, and Nucleation Capital, among others.

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