Engineering clean power for speed and scale

Arbor builds advanced power systems to deliver dependable, emissions-free baseload power at the scale the world requires.

Engineering clean power for speed and scale

Our vision: human ambition in harmony with the planet

Our vision: human ambition in harmony with the planet

We believe a thriving future depends on systems that allow humanity to grow without undermining the world that sustains it. 

Arbor’s vision is grounded in the idea that ambitious engineering—done carefully and responsibly—can unlock abundance. When power systems are reliable, clean, and deliberately designed, they become the foundation for everything that follows.

Our vision: human ambition in harmony with the planet

From aerospace to Earth’s hardest problems

Arbor was founded by engineers who built some of the world’s most demanding systems: rocket engines, advanced turbomachinery, and high-performance power platforms.

Over time, that same team began asking a different question: where could this level of precision and ambition matter most? The answer was here on Earth, where dependable power underpins quality of life, economic growth, and long-term stability.

From aerospace to Earth’s hardest problems

Arbor applies that experience directly to clean baseload power, bringing aerospace discipline to systems designed for the people building what’s next.

From aerospace to Earth’s hardest problems

Our team

Building momentum

2022
  • Founded
  • Opened Arbor’s first office in El Segundo, California
2022
2022
2023
  • Received California Department of Conservation grant
  • Demonstrated supercritical oxy-combustion in Mojave, CA
2024
2024
  • Named Fast Company’s Next Big Things in Tech & TIME’s Best Inventions of 2024
  • Won the U.S. Department of Energy’s Carbon Negative Shot award
  • Signed a multi-year carbon removal agreement with Microsoft
  • Started construction of Arbor’s first test facility in San Bernardino, CA
2024
2025
  • Built ATLAS (1 MW pilot) and delivered to Arbor’s test site
  • Spun ATLAS turbomachinery to more than 35,000 RPM on cold CO₂
  • Signed a $41 million carbon removal offtake agreement with Frontier
  • Secured Series A funding to accelerate pilot testing and development of HALCYON (Arbor’s first commercial power system)
2025
2025
2026