Our People

An expert team of professionals with the experience,
relationships, and creativity to solve even the most challenging
problems for our clients.

Duncan Williams


Duncan Williams is a Partner in the San Francisco office of Greentech. Duncan has extensive advisory and capital markets experience in sustainable infrastructure in both North America and Europe. He has twenty years of relationship-based investment banking experience, for the last ten years at the intersection of industrial and technology, working both with large, established incumbents and emerging growth companies.

Duncan joined Greentech from Wedbush Securities, where he was a Managing Director and Head of the Industrial Growth Technology practice, which he led since 2006. He was previously at UBS Investment Bank in the Industrial and Technology sector practices, based in London and San Francisco.

He holds a Master’s degree in Modern History from Oxford University. Duncan and his wife Ali have three children and live in Marin County.

*Registered representative of the Broker Dealer, Greentech Capital Advisors Securities, LLC.

Other Team Members