Thermal Fluid Analyst

Commonwealth Fusion Systems (CFS) has the fastest, lowest cost path to commercial fusion energy.

CFS collaborates with MIT to leverage decades of research combined with groundbreaking new high-temperature superconducting (HTS) magnet technology. HTS magnets will enable compact fusion power plants that can be constructed faster and at lower cost. Our mission is to deploy these power plants to meet global decarbonization goals as fast as possible. To that end, CFS has assembled a team of leaders in tough tech, fusion science, and manufacturing with a track record of rapid execution. Supported by the world’s leading investors, CFS is uniquely positioned to deliver limitless, clean, fusion power to combat climate change. To implement this plan, we are looking to add dedicated people to the team who treat people well, improve our work by adding multifaceted perspectives and new ways of solving problems, have achieved outstanding results through a range of pursuits, and have skills and experience related to this role.

The SPARC facility features several large-scale fluid systems that manage the heat loads and process flow requirements of a plant designed for 140MW of fusion power.  Fluid systems include ambient temperature and cryogenic helium cooling loops, liquid nitrogen, cooling water, vacuum pumping, gas separation, and gas puffing systems among others. 

As a thermal fluids analyst, this team member will primarily help drive the design progression of one or more fluid system by performing scoping and design analyses for thermal-hydraulic, thermodynamic, and structural systems and components. Assessments will range in complexity from completing evaluations on standard components with standard design criteria to completing evaluations for one-of-kind complex integrated systems and specialized components within these systems to application‑specific design criteria.

• Perform steady-state and transient thermal-fluid and thermodynamic calculations and analyses to support design evaluation and iteration. Evaluations may be performed to internal acceptance criteria or industry standards, depending on the component/system
• Provide input and insights into component and system designs based on calculations and analyses
• Work collaboratively with design engineers on various teams throughout CFS to identify and meet thermal fluids analyses needs
• Present findings at various group meetings and support decision-making based on the evaluations

• Minimum of 1-3 years of experience (3-5 years preferred)
• Bachelors Degree in mechanical or chemical engineering (or similar); Masters degree preferred
• Capable of working independently and as part of team
• Excellent verbal and written communication skills
• In-depth understanding of heat transfer, thermodynamics, fluid mechanics, compressible flow systems, and structural mechanics
• Strong analytical skills
• Ability to work with and knowledge of the tools identified below
• Desire and capacity to simultaneously work multiple dimensions of a fast-paced project

• Process Flow Software (e.g. - Aveva Process Simulation, Aspen Hysys)
• Computational Fluid Dynamics Software (e.g. - ANSYS Fluent)
• Mathcad / Matlab
• Microsoft Office products (Word, Excel, Project, Powerpoint, etc.)
• Ability to occasionally lift up to 50 lbs
• Perform activities such as typing, standing, or sitting for extended periods of time
• Dedication to safety to mitigate hazards that may include heat, cold, and noise
• Willingness to travel or work required nights/weekends/on-call occasionally
• #LI-Onsite

CFS team members thrive in a fast-paced, dynamic environment and have demonstrated exceptional results through a range of different pursuits. We all tightly align with our company values of integrity, execution, impact and self-critique. As we grow, we are looking to add talented people who are mission driven and bring diverse perspectives and new ways of solving problems.

At CFS, we deeply value diversity and are an equal opportunity employer by choice. We consider all qualified applicants equally for employment. We do not discriminate on the basis of race, color, national origin, ancestry, citizenship status, protected veteran status, religion, physical or mental disability, marital status, sex, sexual orientation, gender identity or expression, age, or any other basis protected by law, ordinance, or regulation.