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Our companies are made up of insanely talented people driven to change the world — and many of them are hiring. If you have drive, expertise, and a taste for adventure, we wholeheartedly encourage your interest.

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Showing 59 jobs

Mainspring Energy

Staff Mechanical Engineer - Thermal / Fluids Hardware Design

Mainspring Energy

Menlo Park, CA, USA

22 days

Energy

201 - 1000 employees

Series C+

Senior

about Staff Mechanical Engineer - Thermal / Fluids Hardware Design at Mainspring Energy

Thermal Engineer

USD 95k-115k / year + Equity

1 month

DeepTech

Defense & Space

Government and Military

Manufacturing

Transportation

51 - 200 employees

Series B

Mid-Senior Level

about Thermal Engineer at Impulse Space

Senior Mechanical Engineer (Avionics)

USD 140k-170k / year + Equity

6 days

DeepTech

Defense & Space

Government and Military

Manufacturing

Transportation

51 - 200 employees

Series B

Senior

about Senior Mechanical Engineer (Avionics) at Impulse Space

Summer 2026 Internship - Nuclear Engineer

El Segundo, CA, USA

8 days

Energy

Utilities

51 - 200 employees

Series C+

Internship

about Summer 2026 Internship - Nuclear Engineer at Radiant

Vehicle Engineering Intern (Summer 2026)

USD 30-30 / hour

13 days

DeepTech

Defense & Space

Government and Military

Manufacturing

Transportation

51 - 200 employees

Series B

Internship

about Vehicle Engineering Intern (Summer 2026) at Impulse Space

Mainspring Energy

Senior Mechanical Engineer - Structures Design

Mainspring Energy

Menlo Park, CA, USA

18 days

Energy

201 - 1000 employees

Series C+

Senior

about Senior Mechanical Engineer - Structures Design at Mainspring Energy

Nuclear Engineer - 2026 New Graduate

El Segundo, CA, USA

8 days

Energy

Utilities

51 - 200 employees

Series C+

Entry Level

about Nuclear Engineer - 2026 New Graduate at Radiant

Avionics Test Engineering Intern (Summer 2026)

USD 30-30 / hour

13 days

DeepTech

Defense & Space

Government and Military

Manufacturing

Transportation

51 - 200 employees

Series B

Internship

about Avionics Test Engineering Intern (Summer 2026) at Impulse Space

Senior Avionics Mechanical Engineer

USD 140k-170k / year + Equity

20 days

DeepTech

Defense & Space

Government and Military

Manufacturing

Transportation

51 - 200 employees

Series B

Senior

about Senior Avionics Mechanical Engineer at Impulse Space

Mainspring Energy

Staff Mechanical Engineer - Structures Design

Mainspring Energy

Menlo Park, CA, USA

1 month

Energy

201 - 1000 employees

Series C+

Mid-Senior Level

about Staff Mechanical Engineer - Structures Design at Mainspring Energy

Senior Structures Engineer

El Segundo, CA, USA

1 month

Energy

Utilities

51 - 200 employees

Series C+

Senior

about Senior Structures Engineer at Radiant

Senior Mechanical Engineer - Tin Pump

Middleton, MA, USA

1 month

Renewables & Environment

Sustainability

11 - 50 employees

Series A

Senior

about Senior Mechanical Engineer - Tin Pump at Fourth Power

Senior Mechanical Engineer-Plant Systems

Middleton, MA, USA

1 month

Renewables & Environment

Sustainability

11 - 50 employees

Series A

Senior

about Senior Mechanical Engineer-Plant Systems at Fourth Power

Senior Power Electronics Engineer

El Segundo, CA, USA

1 month

Energy

Utilities

51 - 200 employees

Series C+

Senior

about Senior Power Electronics Engineer at Radiant

Senior Software Engineer - Simulation

El Segundo, CA, USA

1 month

Energy

Utilities

51 - 200 employees

Series C+

Senior

about Senior Software Engineer - Simulation at Radiant

Senior Electrical Engineer

Boston, MA, USA

2 months

Industrial Automation

Manufacturing

51 - 200 employees

Series C+

Senior

about Senior Electrical Engineer at Lumafield

Senior Mechanical Engineer

San Francisco, CA, USA

2 months

Industrial Automation

Manufacturing

51 - 200 employees

Series C+

Senior

about Senior Mechanical Engineer at Lumafield

Electrical Engineer

Boston, MA, USA

2 months

Industrial Automation

Manufacturing

51 - 200 employees

Series C+

Entry Level

about Electrical Engineer at Lumafield

Senior Mechanical Engineer

El Segundo, CA, USA

2 months

Energy

Utilities

51 - 200 employees

Series C+

Senior

about Senior Mechanical Engineer at Radiant

Senior Turbomachinery Engineer

El Segundo, CA, USA

2 months

Energy

Utilities

51 - 200 employees

Series C+

Senior

about Senior Turbomachinery Engineer at Radiant