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Reactor Neutronics Analyst, Nuclear Engineer - Kairos Power

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Job Title
Reactor Neutronics Analyst, Nuclear Engineer
Job Location
Alameda, CA
Job Description

Company Overview

Kairos Power is a new nuclear energy technology and engineering company whose mission is to enable the world’s transition to clean energy, with the ultimate goal to dramatically improve people’s quality of life while protecting the environment. This goal will be accomplished through the commercialization of the fluoride-salt-cooled, high-temperature reactor (FHR) that can be deployed with robust safety, affordable costs, and flexible operation to accommodate the expansion of variable renewables.

Job Summary 

Kairos Power is currently seeking a Nuclear Engineer to join our Nuclear Design and Methods team and assist in the design and construction of our Gen IV test reactor, Hermes. As we work towards achieving first criticality by 2026, we are searching for a highly motivated individual who is eager to make a tangible impact in the world. As a member of the Nuclear Design and Methods team, you will play an integral role in the development of Hermes, contributing to a historical milestone and working alongside a team of skilled professionals. The ideal candidate will share our passion for improving people's quality of life through the development and deployment of advanced reactors. We are looking for someone with a strong technical foundation in neutronics, radiation transport and shielding analysis, and who possesses a natural inclination towards innovation.


  • Support neutronics analysis for Final Safety Analysis Report (FSAR) for Hermes Reactor 
  • Provide innovative solutions to identified engineering challenges
  • Establish collaboration with system engineers across the organization to assess radiation impact on their systems
  • Work with the instrumentation and control team to determine instrumentation requirements
  • Work with other Core design engineers to deliver on neutronics calculations
  • Other duties as assigned


  • MS or PhD degree in Nuclear Engineering, or similar discipline
  • 2+ years of hands-on neutronics analysis through research or work experience 
  • Familiarity with reactor physics, reactor kinetics, and modeling tools
  • Familiarity with Python or similar scripting tools
  • Ability to adjust to iterative approach to design and analysis
  • Ability to partner across various disciplines
  • Familiarity with SCALE, Serpent 2 and/or MCNP
  • Ability to build simple models for complicated geometries
  • Familiarity with variance reduction methods
  • Experience with Python or similar scripting languages
  • Preferred experience with operating research reactors (i.e. rod calibration, fuel inspection, etc.)
  • Ability to work with highly collaborative team
  • Ability to solve problems quickly and efficiently
  • Prioritizes and ensures safety of one self and others
  • Ability to proactively collect, manage and transfer knowledge
  • Ability to seek different and novel ways to create efficiencies when working on problems, challenges and issues

Physical Conditions

  • Remaining in a stationary position, often standing, or sitting for prolonged periods
  • Moving about to accomplish tasks or moving from one worksite to another
  • Communicating with others to exchange information

Environmental Conditions

  • General office environment
  • High temperatures
  • Accessing the accuracy, neatness and thoroughness of the work assigned
  • High-concentration, demanding and fast-paced

Safety and PPE

  • Reading and interpreting hazardous warning signs
  • Reporting issues with equipment or unsafe conditions
  • Wearing proper PPE, to include face mask, face shields, gloves, safety shoes

Additional Requirements 

  • Occasionally requires working weekends
  • Occasionally requires schedule flexibility
  • Occasionally requires extended hours to support launch and critical project timelines

The salary range for this position is $112,800 to $132,700 for employees working onsite at our Alameda, CA headquarters. The range provided in this job posting represents the typical range or starting rate of candidates hired in California.  Factors that may be used to determine your actual salary may include your education, experience, knowledge, skills, abilities, the market data for your work location, and a comparison to other employees already in the role.


About our Benefits

We know that we have some of the most talented and dedicated employees, and we believe in rewarding them accordingly. If you work here, full-time employees (excludes interns) expect to have access to the benefits below:

  • Competitive compensation packages
  • Medical, dental and vision benefits for employees and their dependents
  • Paid Vacation
  • 401(k) and pre-tax health insurance, dependent care, and commuter benefits (FSA)

Kairos Power is committed to building a diverse workforce that reflects the communities where we do business. Kairos Power is an equal opportunity employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, gender, gender identity or expression, sexual orientation, national origin, genetics, disability, age, or veteran status. We actively welcome people of different experiences, abilities, and perspectives.

Kairos Power participates in E-Verify.

Candidates only, no recruiters or agencies please.

Note: You are applying for a position that is located in a facility that handles information that is subject to export control restrictions by the Department of Energy under 10 CFR Part 810. To work in this facility, you need to be authorized by the Department of Energy to access Part 810-controlled information. Foreign nationals who are citizens of countries that are not on the Department of Energy’s general authorization list (link below) are not permitted to work in our facility unless the Department of Energy issues an export control license to the company to permit that individual to have access to Part 810-controlled information. The following questions are intended to determine the licensing requirements that may apply. https://www.law.cornell.edu/cfr/text/10/appendix-A_to_part_810

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Kairos Power Headquarters Location

Alameda, CA

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Kairos Power Company Size

Between 100 - 500 employees

Kairos Power Founded Year


Kairos Power Total Amount Raised


Kairos Power Funding Rounds

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  • Grant

    $16,320 USD