Join Radiant as a Nuclear Engineer, Sensors to lead sensor and instrumentation solutions for innovative portable nuclear microreactors.
Posted by employer 1 month ago
First seen on Joblaze 1 month ago
Last verified on the company career page 1 day ago
Skills & Technologies
What you'll build
- Design and qualify detector systems for radiation monitoring
- Support detector response modeling and verification
- Evaluate sensor performance under harsh conditions
- Integrate sensor outputs into reactor control systems
- Support verification and validation of instrumentation
Must have
- Bachelor's degree in nuclear engineering or equivalent
- 1-2+ years of nuclear engineering industry experience
- Experience with radiation transport methods
- Proficient in at least one programming language
- Basic knowledge of thermal hydraulic principles
- Strong organizational and communication skills
Nice to have
- Hands-on experience in harsh environments
- Experience with data acquisition systems
- Experience with variance reduction techniques
- Familiarity with CAD design software
- At least 1 year of software development experience
Practical constraints
- Must work 100% onsite at El Segundo HQ
- Must be willing to work extended hours and weekends
Requirements
- Experience
- 1–2 years
- Education
- Bachelor's degree
Not disclosed in this posting: compensation, visa sponsorship.
Benefits
Joblaze summary
In this role, the Nuclear Engineer, Sensors at Radiant is responsible for designing and analyzing sensor and instrumentation solutions for the Kaleidos microreactor, focusing on radiation detection and neutron flux monitoring. The position requires expertise in radiation transport methods and proficiency in programming languages like Python or C++. This role is suited for early-career professionals with a background in nuclear engineering and a passion for advanced reactor design. Radiant's startup environment emphasizes collaboration and innovation in developing portable nuclear power solutions.
Joblaze insights
- Listed about a month ago — first seen on Joblaze September 13, 2026. Last confirmed on Radiant's careers page October 27, 2026.
- This exact title is also open at 1 other location at Radiant: El Segundo, CA.
- Python appears in 18.1% of 3188 comparable mid other roles in United States; OpenMC appears in 0.1% of 3188 comparable mid other roles in United States.
Quick facts
- Is the Nuclear Engineer, Sensors role remote?
- No — this is an on-site role in El Segundo, CA.
- How much experience is required?
- 1–2 years of relevant experience for this Nuclear Engineer, Sensors role.
- Where is the role based?
- Radiant is hiring for this position in El Segundo, CA.
- What's the tech stack?
- Joblaze extracted these technologies from the posting: C#, C++, CAD, FORTRAN, MAACS, MCNP.
- What seniority level is this role?
- Radiant targets mid-level candidates for this position.
- Is this full-time or contract?
- Full-time for this Nuclear Engineer, Sensors role at Radiant.
From the original posting
About the Role
Radiant is seeking a highly motivated Nuclear Engineer, Sensors to own sensor and instrumentation solutions for our Kaleidos microreactor. This includes radiation detection, neutron flux monitoring, and instrumentation design and qualification for reactor physics, shielding, and safety analysis applications. You will lead and own instrumentation initiatives and studies, strategic direction, and work closely with a collaborative nuclear and engineering team in a fast-paced startup environment. The ideal candidate is passionate about advanced reactor design, detail-oriented, effectively communicates, and has a tenacity to solve interesting technical challenges.
Responsibilities & Duties
Ownership of sensor and instrumentation design and analysis, examples include:
Radiation Detection: Design, specify, and qualify in-core and ex-core detector systems (fission chambers, ion chambers, and other detector technologies) for neutron flux and radiation monitoring.
Detector Modeling: Support detector response modeling and verification using radiation transport codes to ensure sensor design meets performance requirements.
Environmental Qualification: Evaluate and validate sensor survivability and performance under high-temperature, high-radiation, and accident-condition environments.
Systems Integration: Partner with reactor control and data acquisition (DAQ) engineers to integrate sensor outputs into reactor monitoring, protection, and control systems.
Verification & Validation: Support V&V of instrumentation against customer and regulatory requirements.
Collect requirements, provide expertise and feedback to engineers in other functional areas via clear, constructive communication.
Other nuclear instrumentation and sensor design/analysis duties as assigned.
Required Qualifications & Skills
Bachelor's degree in nuclear engineering or equivalent degree from an accredited institution.
1-2+ years of nuclear engineering industry experience (MS equivalent to 2 yrs), with exposure to radiation detection or instrumentation.
Experience with radiation transport methods, including with codes such as MCNP/OpenMC/Serpent.
Proficient in at least one of the following programming languages: Python, C++, C#, FORTRAN, or another scientific computing language.
Basic knowledge of thermal hydraulic principles.
Self-motivated with strong organizational, written, and oral communication skills.
Experience working in an engineering organization and developing high-quality work.
Desired Qualifications & Skills
Hands-on experience designing, testing, or qualifying sensors/instrumentation in harsh environments (high temperature, high radiation).
Experience with data acquisition (DAQ) systems and integration with reactor control systems.
Experience with variance reduction techniques and associated software (Attila4MC and/or ADVANTG), is a plus.
Competency in distributed software development processes and high-performance computing environments.
Familiarity with CAD design software (NX, SolidWorks, and/or SpaceClaim), is a plus.
Familiarity with dose consequence methods and software such as MAACS or NRC-RADTRAN.
At least 1 year of software development or scripting experience.
Hands-on experience designing hardware and/or performing tests.
Additional Requirements
Must be willing to work extended hours and weekends as necessary to accomplish our mission.
Must work 100% onsite at El Segundo HQ.
Benefits and Perks
Stock: Substantial incentive stock plan for all full-time employees.
Daily catered lunch. Free snacks and drinks.
Flexible PTO policy. Remote workday allocation.
Standard company text repeated across Radiant's postings is omitted here.