People that are good to work with

The Entrepreneurs Fund team brings broad experience from investing in different geographies and sectors at different life cycles. We’re committed, supportive, easy to talk to, pragmatic and driven to find solutions. Above all, we’re passionate about innovation in the life sciences and technology sectors.

  • Klaas de Boer

    Managing Partner

    Klaas previously created and led a corporate venturing team at Vanenburg Group whose investments included WebEx. Prior to that, he spent time as a consultant with McKinsey and Company in both Amsterdam and St Petersburg. Behind Klaas’ achievements are an MSc in Physics and an Insead MBA.

  • Dennis Brenninkmeijer


    Educated at the European Business School in London, Dennis had an 18 year career in clothing retail at C&A that saw him become Procurement Director in South America before working at ABN AMRO at Associate level as an investment manager.

  • Alexander Hardtmuth

    Investment Manager

    Alex started his career in principal investing with AnaCap Financial Partners, a London-based Private Equity fund. Before that he was a consultant with Arthur Andersen and KPMG. Alex holds an MSc Finance degree from LBS, and an MSc in Industrial Engineering from ETH Zurich.

  • Martin Hopson


    Martin is responsible for the back office and finance function of the firm. Before joining EF Martin was the Finance Director at On-Air Systems Ltd and started his career at Deloitte & Touche. Martin is a Chartered Accountant, has an MBA from City University Business School and a BSc in Economics with Accountancy from Loughborough University.

  • Martina Griffin

    Personal Assistant

    Grew up in Singapore and has been in the UK since 2000. Martina speaks Japanese and Mandarin.