Summer 2025 Technical Interns

Thanks for your interest in Oklo!  This is a call for interns from different disciplines interested in joining the team for Summer 2025!

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
• Be available to work 30-40 hours per week between June 2, 2025 - August 15, 2025 (depending on the scope of work)
• Be currently enrolled or recently (2025) graduated with a Bachelor's or Master's Degree from an accredited university

Intern Position Descriptions

Neutronics Methodologies Intern

• As part of the neutronics team this intern will assist in:
  • updating and streamlining neutronic methodologies to align with the latest format and standards,
  • ensuring that the methodologies match the way the code base builds the model, verifying consistency across both
  • 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 Skills:
  • 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.

Mechanical Prototyping Intern

• The prototyping engineering intern will be a part of the prototyping and visualization team. They will:
  • 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.
  • Ability to relocate to Santa Clara, CA for the summer.
  • 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).

Thermal-Hydraulics/Fluid Systems Intern

• Discipline(s): nuclear engineering, chemical engineering, mechanical engineering
• Required qualifications: Coursework in fluid mechanics
• Preferred qualifications
  • experience designing and modeling 1-D fluid networks
  • experience with 1-D thermo-fluid network modeling tools such as GOTHIC, Fathom, Flomaster, or RELAP 
  • experience with programming languages such as Python and C#
• Project Description
  • We are looking for an intern to work on whole-plant 1-D fluid network models. The intern will develop and run models for steady-state and transient systems, implement custom component models, and provide detailed reports of results. Mentorship in system modeling in general and in specific tools will be provided.

Computational Fluid Dynamics Intern (modeling)

• Discipline(s): Nuclear engineering, chemical engineering, mechanical engineering
• Required qualifications: Coursework in fluid mechanics, experience with 3-D Computational Fluid Dynamics (CFD)
• Preferred qualifications
  • experience with ANSYS Fluent, STAR-CCM+, or OpenFOAM
  • experience with Large Eddy Simulation (LES)
  • experience with 1-D thermo-fluid network modeling tools such as GOTHIC, Fathom, Flomaster, or RELAP
  • experience with Python
• Project description
  • We are looking for an intern to develop high-fidelity Computational Fluid Dynamics models. The intern will mesh and run models on high performance computing resources and compare results to reduced order models. Mentorship and assistance in both CFD and reduced order modeling will be provided.

Computational Fluid Dynamics Intern (meshing)

• Discipline(s): Nuclear engineering, chemical engineering, mechanical engineering, computer science
• Required qualifications: Experience with generating and manipulating meshes for use in computational physics
• Preferred qualifications
  • experience with meshing for ANSYS, Nek5000, or OpenFOAM
  • experience with scripting languages such as Python, MATLAB, or Julia
  • experience with compiled languages such as Fortran, C, C++, or Rust
• Project description
  • We are looking for an intern to improve meshing workflows for Computational Fluid Dynamics (CFD) models. The intern will develop scripts and compiled programs to efficiently create high-quality meshes for complicated components. Development will include both stand-alone programs and scripting within commercial tools. Mentorship and assistance in CFD and software development will be provided.

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 Skills

• • Fluency in Python (or another object-oriented programming language)
  • Prior experience with finite element analysis
  • 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

Competencies

We are looking for engineers 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 engage in fun team-building activities as well as interactive workshops, enhancing both professional and personal growth.

About Oklo Inc.: Oklo Inc. (NYSE: OKLO) is a fast fission clean power technology and nuclear fuel recycling company developing fast fission power plants to provide clean, reliable, and affordable energy at scale. Oklo received a site use permit from the U.S. Department of Energy, was awarded fuel material from Idaho National Laboratory, submitted the first advanced fission custom combined license application to the Nuclear Regulatory Commission, and is developing advanced fuel recycling technologies in collaboration with the U.S. Department of Energy and U.S. National Laboratories.