The role
What you'll do
- Developing new analysis methods to predict material behavior in service
- Performing engineering analyses, including assessments of thermal performance, mechanical performance, safety performance, manufacturability, and cost.
- Collaborating cross-functionally to provide technical feedback to quick-iterating computational teams.
- Authoring technical reports using modern documentation tools and techniques
- Required Qualifications Experience working with and developing material behavior models
- 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
- 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
- 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.
- 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
- Work with engineers to develop and execute testing procedures for mechanical systems
The bar
What you'll bring
- 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 7, 2027 - August 20, 2027 (depending on the scope of work)
- Be currently enrolled or recently (2027) graduated with a Bachelor's or Master's Degree from an accredited university
- 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
- Materials Intern
- Working with members of Oklo’s Materials Team, will help with the selection and qualification of materials for use in nuclear reactor systems. Typical work duties include computational model development and implementation, engineering analysis, documentation, and interfacing with our fuel fabrication and engineering teams.
- Key Responsibilities Analyzing material performance across expected operating conditions
- Experience with material characterization (material testing, metallography)
- Background in nuclear, chemical, materials engineering, or equivalent
- Motivated learner who is adept at efficiently summarizing literature
- Bonus Qualifications Experience with engineering simulation software, such as ANSYS or COMSOL
- Coding or data analysis experience (e.g., Python or similar tools)
- 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
- 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
Additional notes
Other
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 2027. 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.
Intern Position Descriptions
Core Thermal Hydraulics Intern
The CTH Intern will 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
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
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.
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.
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.