John Oldenburg

Investment Stage

Focus Areas

About Investor

John Oldenburg is a Managing Director at Quantum Capital Group with extensive experience investing in infrastructure, renewable energy, and sustainable energy businesses. Before joining Quantum, he held senior investment roles at The Carlyle Group and earlier worked at Bregal Energy and UBS Investment Bank. His expertise is strongest in energy infrastructure, renewables, decarbonization, power, project finance, and large-scale investment transactions. Founders are most likely to find him relevant when building companies connected to energy transition, infrastructure, industrial technology, or capital-intensive sustainability markets. He brings deep experience in evaluating complex projects, capital structures, strategic financing, and institutional-scale investment opportunities. His background is less oriented toward lightweight software startups and more valuable for companies where physical infrastructure, project economics, or large capital requirements matter. He is a strong fit for founders who need an investor with sophisticated energy and infrastructure investment experience.