Senior Mechanical Engineer (US)

We are looking for a Senior Mechanical Engineer with 6+ years of experience to design, build, and scale novel rare earth reactors and production lines from concept through commissioning. You'll join a lean, high-output team of engineers and scientists from MIT, Tesla, and SpaceX who are building an entirely new category of American metalmaking. Everything is fabricated in-house, vacuum induction furnaces, high-temperature reactors, tilt casting systems, and automated production lines, meaning you'll own real, end-to-end projects that directly enable the company's rapid scale-up. Solcoa has $75M in seed funding, 10 tons of annual production today, and is racing to commission a 500-ton plant by mid-2027. If you want to work on bold mechanical engineering challenges with immediate, tangible impact, this is it.

What will you be doing?

• Designing and building novel reactor subsystems, vacuum induction furnaces, and high-temperature production equipment entirely in-house

• Owning mechanical design projects end-to-end, from CAD modeling through fabrication, prototyping, and commissioning on active production lines

• Engineering complex systems such as tilt casting mechanisms for molten metal handling, high-vacuum systems, and automated material handling

• Specifying components, tolerances, and materials of construction for extreme environments (high-temp, corrosive, vacuum)

• Collaborating with the in-house fabrication shop and operations team to rapidly iterate and scale new production capacity