Probabilistic Risk Assessment Engineer

Oklo Inc; Santa Clara (CA); Hybrid; USD 160,000 - 210,000; Full time

Benefits offered by this job

Equity

Bonuses

401(k)

Health insurance (employer contrib.)

HSA

FSA

Flexible work hours

Wellness credits

Job summary

Oklo Inc. is seeking a Probabilistic Risk Assessment (PRA) Engineer to join our team in Santa Clara, CA.

You will conduct probabilistic risk analyses to support fast reactor design, licensing, deployment, and operations, collaborating with engineering groups to develop event trees, fault trees, and quantify event sequence probabilities. You will apply PRA techniques to evaluate external hazards, drive design improvements for reliability and safety, and support licensing through technical reports

Qualifications

• At least 5 years of work experience in PRA or related field.
• Bachelor’s degree or higher in nuclear, mechanical, aerospace engineering, or similar.
• Familiarity with PRA techniques and risk analysis.
• Excellent written and verbal communication skills.

Responsibilities

• Develop probabilistic risk analysis models of fast reactor designs.
• Analyze event sequences and compile risk insights with engineering teams.
• Evaluate external hazards using PRA techniques.
• Incorporate risk insights into design to improve reliability and safety.
• Support licensing activities through technical reports and analyses.

Skills

PRA techniques

Event trees

Fault trees

FMEA

Education

Bachelor’s degree or higher in nuclear, mechanical, aerospace engineering, or similar

Tools

CAFTA

SAPHIRE

ADAPT

RAVEN

Job description

Thanks for your interest in Oklo! We are searching for a Probabilistic Risk Assessment (PRA) Engineer to join our team.

Position Description

The Probabilistic Risk Assessment (PRA) Engineer is responsible for conducting probabilistic risk analyses to support our fast reactor design development, licensing, deployment, and operation. PRA Engineers work with our engineering teams to conduct quantitative risk analyses, including identification of initiating events (via hazards evaluation approaches such as Failure Modes and Effects Analysis (FMEAs)), development of event trees and fault trees, quantification of event sequence probabilities, and evaluation of event sequence consequences. PRA Engineers also work with our engineering design teams to incorporate risk insights back into the design to drive improvements in reliability and safety.

Specific responsibilities may include:

• Developing probabilistic risk analysis models of our fast reactor designs
• Working with our engineering analysis teams to analyze event sequences and compile risk insights
• Using PRA techniques to evaluate external hazards
• Working with our engineering design teams to incorporate risk insights into the design and improve system reliability
• Supporting licensing activities through generation of technical reports, technical analyses, and supporting documentation

Minimum Qualifications:

• At least 5 years of work experience
• Bachelor’s degree or higher in nuclear engineering, mechanical engineering, aerospace engineering, or similar
• Familiarity with PRA techniques
• Strong problem-solving skills and the ability to work effectively in a collaborative team environment
• Excellent written and verbal communication skills

Bonus Qualifications:

• Advanced training/education/experience in PRA
• Experience delivering products for regulatory review (DOE authorization, NRC licensing under 10 CFR Parts 50 or 52)
• Experience with PRA software (CAFTA, SAPHIRE, ADAPT, RAVEN, etc.)
• Experience with fast reactor design and analysis
• Experience with hazard analysis (FMEAs, Hazard and Operability Studies (HAZOPS), What-if Analysis)
• Experience with transient or source term analysis
• Experience with human reliability analysis
• Experience in operations, maintenance, or engineering support of operating nuclear power plants

We are looking for a PRA engineer that is:

• Passionate about clean energy
• Passionate about making advanced fission a reality
• Willing and able to learn quickly
• Eager to work on a dynamic team, receive constructive feedback, and grow with us
• Willing to think differently and do things in new ways
• Comfortable in a fast-paced, highly iterative startup environment
• Excited to think creatively, critically, and reflectively about the problems they are solving, while not leaning only on what has been done before
• Willing to propose novel and creative solutions to technical problems
• An excellent writer who can write in modern active voice, so make your cover letter compelling and write it well!
• Able to communicate technical content and results verbally

Who you are:

A startup person: You aren't driven by titles or hierarchy, and prefer efficiency to excess process. You don't need or expect to have a lot of guidance but you enjoy working in a fast-paced team. If you prefer the culture and feel of a large organization, that is great, but you likely won’t enjoy working with us! There is plenty of important work and plenty of good opportunities with organizations like that.

Motivated: You are self‑motivated. You bring an enthusiasm to the team, and imbue a sense of passion that goes beyond clocking in and clocking out. This isn’t about a fake or arbitrary “pieces of flair” mentality or lack of work‑life balance! It is about being a part of the vision and feeling a part of reaching team goals.

A team‑player: Oklo genuinely is a team. We aren’t about taking credit for ourselves, and we aren’t about pushing blame to others. We do incredible things because we work as a team.

An excellent communicator: We need a person who is not only technically competent but also a clear and upbeat communicator.

Creative: Being creative means that when things fall outside clear scopes or processes or problems arise without clear solutions, you are able to identify it as well as invent ways to solve a problem or fill a need without micromanagement. The successful person in this job will not only be creative, but also enjoy being creative and solving open-ended problems which may change day‑by‑day.

Detail‑oriented: This focus is a big part of excellence, consistency, and quality. Excellent grammar and spelling matter for both good communication as well as the image of the company that we put forward.

Oklo requires remote employees to travel to headquarters (Santa Clara, CA) twice a quarter annually, based on business or team needs, including attendance at team meetings, off‑sites, and other company events or gatherings. For the first two weeks of onboarding, employees are required to be in person at headquarters in Santa Clara, CA.

Oklo offers flexible time off, equity, bonuses, competitive pay, 401(k), health insurance (with employer contribution), HSA, FSA, flexible work hours, wellness credits, and other benefits.

This position may involve access to information subject to U.S. export control laws. Only applicants who meet the definition of a U.S. person under applicable laws may be eligible.

About Oklo Inc.:

Oklo Inc. is developing fast fission power plants to deliver clean, reliable, and affordable energy at scale; establishing a domestic supply chain for critical radioisotopes; and advancing nuclear fuel recycling to convert nuclear waste into clean energy. Oklo was the first to receive a site use permit from the U.S. Department of Energy for a commercial advanced fission plant, was awarded fuel material from Idaho National Laboratory, and submitted the first custom combined license application for an advanced reactor to the U.S. Nuclear Regulatory Commission. Oklo is also developing advanced fuel recycling technologies in collaboration with the U.S. Department of Energy and U.S. National Laboratories.

#CHOP: Oklo’s Values

Collaboration: We go further, together. We bring diverse perspectives, listen actively, and build trust through transparency and respect. We work across disciplines, sharing ownership to turn complex challenges into shared successes.

Humility: We are team players who act for the good of the company and for the world. We are focused on our mission, not personal recognition.

Ownership: We take pride in what we do and how we do it. We are proactive in finding solutions and see tasks through to completion. We are committed to delivering on our promises to provide clean, reliable, and affordable energy.

Pathfinding: We chart new ground where no path exists by approaching challenges with curiosity, courage, and creativity while navigating ambiguity.

Candidates should be aware that employment may be contingent upon successful completion of a drug screening, and employees may be subject to drug testing at any time in accordance with company policy and applicable laws.

About Oklo compensation

Salary: $160,000-$210,000

Oklo offers flexible time off, equity, bonuses, competitive pay, 401(k), health insurance (with employer contribution), HSA, FSA, flexible work hours, wellness credits, and other benefits.

Recruitment Fraud Disclaimer

Oklo is aware of recent recruitment fraud attempts targeting job seekers. Please be cautious of anyone claiming to represent Oklo who does not contact you from an official Oklo email address.

All legitimate communications from our recruiting team— including application updates, interview requests, and job offers — will come exclusively from an @oklo.com email. Oklo will never ask for sensitive personal information, payments, or account credentials during the hiring process.

If you receive suspicious outreach or have concerns about the authenticity of any communication claiming to be from Oklo, please contact us through the official channels listed on our website.