John (J.B.) Oldenburg

Investment Stage

Focus Areas

About Investor

John (J.B.) Oldenburg is a Managing Director at Carlyle Global Energy, having rejoined The Carlyle Group in 2026 after serving as Managing Director at Quantum Capital Group. He specializes in energy infrastructure, renewable power, energy transition, conventional power generation, and digital infrastructure investments. His experience includes investments in Aspen Power and board roles at Cogentrix Energy and 547 Energy. He focuses primarily on infrastructure and private equity transactions rather than traditional early-stage venture capital.