About Commonwealth Fusion Systems:  Commonwealth Fusion Systems is on a mission to deliver the urgent transition to fusion energy. Combining decades of research, top talent and new technologies, we’re designing and building commercially viable fusion power plants. And working with policymakers and suppliers to build the energy industry of the future.  We’re in the best position to make it happen. Since 2018, we’ve raised over $2 billion in capital – more than any other fusion energy company in the U.S. Now we’re looking for more thinkers, doers, builders, and makers to join us. People who’ll bring new perspectives, solve tough problems, and thrive as part of a team.  If that’s you and this role fits, we want to hear from you. Join the power movement as a Senior Mechanical Engineer, Fueling Systems CFS is well into the construction phase of our Smallest Possible Affordable Robust Compact (SPARC) fusion machine that will demonstrate commercially-relevant fusion power. In parallel we are advancing the design of our first electrical power-producing fusion device: ARC.   The senior mechanical engineer for the SPARC fueling systems will work closely with the system responsible engineer and technical leads to complete designs and deliver production assemblies of electro-mechanical gas injection systems that deliver process gases into the ultra-high vacuum of SPARC. These systems are designed for inert and hydrogen gas applications, fast response times, operating in rough to high vacuum, and with high leak-tightness with challenging structural and magnetic loads and radiation environments. The senior mechanical engineer will also be responsible for delivering structural mounting assemblies that meet loading conditions from gravity, thermal and electromagnetic conditions. This role will involve design work, systems integration, vendor management, close collaboration with construction, installation and software teams, and hands-on build/test activities.   Fueling systems engineers collaborate with an interdisciplinary team of engineers, builders, scientists, vendors, and supply integration managers, and report to the gas fueling system responsible engineer. We are looking for applicants who enjoy collaborating with a variety of disciplines in a fast-paced environment to help us deliver fusion on climate-relevant time scales.   Applicants with hands-on experience with designing, building, testing process systems (gas, fluid, vacuum), and / or experience designing for high radiation and magnetic field environments are preferred. What you'll do:

Lead completion of preliminary gas injection equipment designs into production-ready designs and documentation

Collaborate with SPARC analysis teams to deliver structural mounts for gas injection equipment

Manage vendors to deliver production parts and assemblies on time and in budget

Collaborate with SPARC assembly teams to develop and execute plans for gas equipment assembly

Collaborate with CFS software and Operations teams to develop and test system functionality

Verify system performance using test benches and as a final assembly on SPARC

What we’re looking for:

Bachelor’s degree or similar experience in mechanical engineering, chemical engineering, applied physics

Design of complex electro-mechanical equipment

Verification / validation of electro-mechanical equipment

Management of vendors to produce high quality components and systems to specifications

Writing and designing to requirements

Analyzing  components/assemblies for mechanical stresses

Designing / building welded components

Working with a manufacturing or assembly or construction team

Working within an organization’s design control process

Collecting data, reporting results in written and oral formats

CAD tools (NX preferred)

Strong problem solving skills

MS office suite

Collaboration tools (Confluence, JIRA, etc)

Bonus points for:

Designing high vacuum, high pressure gas systems

Ansys or other mechanical analysis tools

Designing solenoid or other electrical motor driven devices.

Working  with / designing electro-magnets, designing for magnetic field environments

Designing for high radiation environments.

Process engineering, developing P&IDs, process flow diagrams

Working with a software team to implement system functionality

CFD / heat transfer analysis tools

Working with PLM tools (Teamcenter preferred)

Python or MATLAB programming

Must-have Requirements:

Ability to occasionally lift up to 50 lbs

Perform activities such as typing, standing, or sitting for extended periods of time

Willingness to travel or work required nights/weekends/on-call regularly

Work in a facility that contains industrial hazards including heat, cold, noise, fumes, strong magnets, lead (Pb), high voltage, high current, pressure systems, cryogenics, hazardous gas and radiological hazards