About GreenCity Power

GCP’s Principals have 40+ years of cogen experience across a variety of complex, space constrained sites, which are being applied to benefit Industrial and Commercial Customers. After spending the last two decades helping industrials improve their energy efficiency, profitability and environmental impact, GCP’s principals have developed an approach to apply the same expertise on a smaller scale for the benefit of commercial customers that own office buildings, hospitals and hotels.

Our principals have:

  • Designed, built, owned and operated over 300MW of cogen projects across US, North America, Europe and Asia
  • Deployed in excess of $350M of capital into cogen projects and have raised in excess of $1BN for energy projects
  • Executed projects across numerous energy intensive industries including: Steel, Petrochemicals, Metals, Pulp & Paper, Chemicals, Building Products, Food Processing and Universities
  • Average efficiency of our projects at least 2x the US electric grid
  • Significantly reduced the environmental footprint (CO2 emissions) of each customer site

Our Founders


Tom O’Brien

Managing Partner

Read more about Tom

Aaron Walters

Managing Partner

Read more about Aaron

Past Clients