We are excited to announce an open call for talented interns to join Oklo's dynamic team! Below are multiple positions across various disciplines that may be available, offering the chance to work on innovative projects for Summer 2026. If you're passionate about solving complex challenges, thrive in a collaborative environment, and are eager to contribute to groundbreaking solutions, we encourage you to apply.

Requirements

Oklo interns are required to:

Relocate or be available to work out of Santa Clara CA where Oklo Headquarters is located for the duration of the internship or out of one of our satellite locations in Denver, CO, Brooklyn, NY, Idaho Falls, ID, or Washington D.C.
Be available to work 30-40 hours per week between June 1, 2026 - August 14, 2026 (depending on the scope of work)
Be currently enrolled or recently (2026) graduated with a Bachelor's or Master's Degree from an accredited university

Intern Position Descriptions

Core Thermal Hydraulics Intern

We are looking for an intern to develop intermediate fidelity (IF) subchannel and high-fidelity computational fluid dynamics (CFD) models for applications in sodium fast reactors (SFRs). The project will involve comparisons between simulation results and experimental data. The exact topic will depend on interest and company needs but could cover fluid-structure interaction, turbulence model development, uncertainty quantification, or surrogate modeling.

Required Qualifications
- Coursework in fluid mechanics and heat transfer
- Experience with 3-D CFD and meshing workflows
- Proficiency in Python
- Clear technical communication and documentation skills
Bonus Qualifications
- Experience with advanced 3-D CFD concepts (large eddy simulation, fluid-structure interaction)
- Familiarity with high-performance computing workflows and tools
- Experience with MOOSE
- Familiarity with statistics and reduced order modeling

Fuel Performance Intern

Working with members of Oklo’s Materials and Fuel Performance Team, this intern will explore the potential of lower-order fuel performance models to help accelerate our core-design iteration.

Key Responsibilities
- Assess the trade-off between computational cost and accuracy of lower-order fuel performance models
- Distill key phenomena for a variety of safety and design applications in order to calibrate simplified models against validation cases
- Benchmark new fuel performance tools
- Integrate original analysis and data processing into our production stack

Required Qualifications
- Fluency in Python (or another object-oriented programming language)
- Prior experience with finite element analysis (FEA)
- Background in nuclear engineering and familiarity with reactor physics
- Motivated learner who is adept at efficiently summarizing literature

Bonus Qualifications
- Exposure to the MOOSE modeling suite
- Strong understanding of statistics and/or uncertainty quantification
- Coursework or research related to materials science

Mechanical Analyst Intern

This intern will contribute to the evaluation and optimization of mechanical components that are critical to Oklo’s advanced power plant designs. This position offers hands-on experience in applying engineering fundamentals, performing structural analysis, and integrating results into design iterations.

Key Responsibilities
- Apply first-principles mechanics and strength of materials to support analysis of structural components
- Assist in summarizing mechanical analysis results for design teams, highlighting key findings such as peak stresses, margins of safety, and potential design revisions
- Support the development of technical documentation, ensuring clear and concise communication of assumptions, methods, and results
- Collaborate with design, manufacturing, and testing teams to help inform design improvements

Required Qualifications
- Working toward a degree in Mechanical Engineering, Aerospace Engineering, Materials Science, or a related discipline
- Strong foundation in mechanics of materials, dynamics, and heat transfer
- Exposure to FEA tools (e.g., Ansys, Abaqus, COMSOL, or similar) through coursework or projects
- Proficiency in Python, MATLAB, or another programming language for basic data analysis or workflow automation
- Strong communication skills with the ability to clearly document and present technical findings

Bonus Qualifications
- Prior research or project experience involving creep, fatigue, or thermal-mechanical problems
- Familiarity with engineering codes and standards (e.g., ASME, AISC, or similar)
- Experience using Git or another version control system

Instrumentation and Controls Intern

This intern will contribute to the development, integration, and testing of measurement and control systems that support advanced reactor operation and power generation. This position provides hands-on exposure to sensors, automation, and control strategies, while giving interns the opportunity to apply classroom knowledge to real-world engineering challenges.

Key Responsibilities
- Assist in developing and testing sensors, instrumentation, and actuators under real design constraints
- Help design and implement control algorithms for equipment and processes
- Support the integration of I&C components into reactor systems and analysis workflows
- Contribute to documenting methods, results, and system designs in a clear and professional manner
- Collaborate with design and analysis teams to provide feedback that supports rapid iteration and improvement

Required Qualifications
- Working toward a degree in Electrical Engineering, Mechanical Engineering, Computer Engineering, or a related field
- Familiarity with measurement techniques, data acquisition, and signal processing
- Exposure to control theory and feedback systems through coursework or projects
- Basic programming skills in Python (or similar) for data analysis and automation
- Strong communication skills and an eagerness to learn in a collaborative environment

Bonus Qualifications
- Experience with circuit design (analog or digital) from labs, research, or projects
- Exposure to communication protocols and digital networks
- Familiarity with Git version control

Neutronics Methodologies Intern

This intern will assist in updating and streamlining neutronic methodologies to align with the latest format and standards. They will ensure that the methodologies match the way the code base builds the model, verifying consistency across both. This position also involves identifying and documenting gaps or discrepancies in the review process for future improvements.

Key Responsibilities
- Update and optimize neutronic methodologies to the latest format and standards.
- Ensure methodologies align with the way the code base builds the model.
- Identify and document any gaps or discrepancies in the current processes.
- Collaborate with team members to ensure consistency and accuracy in modeling procedures.

Required Qualifications
- Proficient in Python for scripting and automation.
- Familiar with AsciiDoc for documentation and formatting.
- Strong background in nuclear engineering and neutronics.
- Attention to detail with an ability to identify gaps in methodologies and processes.

Process Intern

This intern will support the design and analysis of fluid and power systems that are essential to Oklo’s advanced reactors. This position provides hands-on experience with system modeling, equipment evaluation, and prototyping, offering interns a chance to apply classroom knowledge to real-world energy systems.

Key Responsibilities
- Assist in designing fluid and process systems, including piping, valves, pumps, compressors, and heat exchangers
- Support definition of process equipment specifications, performance criteria, and operating conditions
- Contribute to prototype setup and testing activities for iterative system design and validation
- Help prepare technical documentation to support system layout, fabrication, installation, and operation
- Collaborate with engineers on analyses to evaluate performance and inform design refinements
- Document results and methods in a clear and professional manner for use across design and regulatory teams

Required Qualifications
- Working toward a bachelor’s or master’s degree in Mechanical Engineering, Chemical Engineering, Nuclear Engineering, or a related discipline
- Background in thermodynamics, fluid mechanics, and heat transfer through coursework or projects
- Familiarity with process or system modeling tools (e.g., MATLAB, Python, Aspen, or similar)
- Strong problem-solving skills with attention to detail
- Ability to clearly communicate technical findings through reports or presentations

Bonus Qualifications
- Experience with lab work, prototyping, or experimental systems
- Exposure to piping and instrumentation diagrams (P&IDs) or process design coursework
- Familiarity with pumps, heat exchangers, or thermal-fluid systems from research or internships

Prototyping/Manufacturing Intern

The prototyping engineering intern will be a part of the prototyping and visualization team.

Key Responsibilities
- Assist in machining and general fabrication of prototypes and test setups
- Work with engineers to develop and execute testing procedures for mechanical systems
- Support assembly, troubleshooting, and optimization of electro-mechanical systems
- Conduct inspections and quality control on fabricated components
- Document test results, process improvements, and technical findings
- Collaborate with the engineering team to improve designs and manufacturing processes
- Maintain a safe and organized workspace

Required qualifications
- Mechanical, manufacturing, electrical, nuclear, chemical, or similar engineering student graduating with bachelors, masters, or PhD within the following year
- Hands-on experience with mechanical fabrication, machining, or assembly
- Good understanding of mechanical design, materials, and manufacturing processes
- Familiarity with mechanical measurement tools (calipers, micrometers, etc.)
- Ability to read and interpret engineering drawings and schematics
- Strong problem-solving skills and ability to work independently and in a team environment
- Good communication and technical documentation skills

Bonus qualifications
- Experience with manual or CNC machining
- Exposure to electronics, sensors, and control systems (mechatronics experience)
- Experience with CAD software (SolidWorks, AutoCAD, or similar)
- Experience with welding, 3D printing, or other prototyping techniques
- Understanding of fluid mechanics, thermodynamics, or materials science
- Experience with data acquisition systems and programming (Python, LabVIEW, or MATLAB)

Business Operations Intern

This role provides an opportunity to gain hands-on experience in business operations, process improvement, and cross-functional collaboration. This role is ideal for someone looking to grow their operational skill set in core business operational functions and is passionate about contributing to initiatives that drive efficiency while supporting key compliance functions across the organization.

Key Responsibilities
- Assist with day-to-day business operations, including process documentation, workflow optimization, and project coordination.
- Collect, organize, and analyze operational and financial data to generate insights and support decision-making.
- Prepare reports, presentations, and dashboards for internal stakeholders.
- Collaborate with cross-functional teams (finance, HR, marketing, product, etc.) to support operational initiatives.
- Conduct research on industry trends, competitors, and best practices to support strategic planning.
- Identify and recommend opportunities for process improvements and increased efficiency.
- Provide administrative and logistical support for team projects and meetings.

Required Qualifications
- Currently pursuing a bachelor’s degree in Business Administration, Operations Management, Economics, or a related field.
- Strong analytical, organizational, and problem-solving skills.
- Proficiency in Microsoft Office Suite (Excel, PowerPoint, Word) or Google Workspace.
- Excellent written and verbal communication skills.
- Ability to work independently and collaboratively in a fast-paced environment.
- Attention to detail and eagerness to learn.

Competencies

We are looking for interns that are:

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.

About Oklo's Intern compensation:

Oklo offers housing assistance, $35 - $44 per hour (compensation is determined based on education, skills, and experience), 1-on-1 mentorship, hands-on training, and the opportunity to engage in fun team-building activities as well as interactive workshops, enhancing both professional and personal growth.

Due to the nature of Oklo's work, only U.S. citizens can be considered for these positions.

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.

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 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.

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