Ben Guest

Gresham House

Head of Gresham House New Energy.
Ben founded Hazel Capital (now Gresham House New Energy) in April 2007 and was the managing partner and chief investment officer. He is the head of the Gresham House New Energy division and fund manager for the British Strategic Investment Fund (BSIF).
With 22 years of investment experience, Ben’s expertise spans the investment spectrum, from infrastructure, to public equities and venture capital. He is responsible for the origination and execution of investment opportunities alongside on-going portfolio management.
Prior to founding Hazel Capital, Ben was a co-founder of Cantillon Capital, where he managed a $1 billion equity hedge fund focused on technology globally from 2003 to 2007. He started his fund management career in 1994 at Lazard Asset Management, having graduated from Imperial College, London with a BEng in Mechanical Engineering.

dont miss




  • Lesley Rudd: Speaking at the Contamination Expo

    Lesley Rudd - Decarbonising Heat – What and How?

  • Clive Murray: Speaking at the Contamination Expo

    Clive Murray - Water as a traded commodity ‘’ Lets put a price on water’’

  • George Giles: Speaking at the Contamination Expo

    George Giles - How should we Design, Build & Operate future EfW plants

  • Emil Rangelov: Speaking at the Contamination Expo

    Emil Rangelov - Zero emissions vehicles and autonomous driving - oh my!

  • Scott Edy: Speaking at the Contamination Expo

    Scott Edy - Vehicle Charging Infrastructure: Fuel - Open to everyone!”