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Martin Fiennes

Partner, Deep Tech

Martin Fiennes

Martin joined Oxford Science Enterprises in 2015, bringing over 25 years’ experience investing in Deep Tech businesses.

At OSE, Martin works within the Deep Tech team sourcing new companies and supporting the growth of the existing portfolio.

Martin began his venture capital career as an Investment Manager, later becoming an Investment Director, at Top Technology Ventures in 1997. Early-stage UK technology companies he worked with while at Top Technology included IP Group, Focus Solutions Group and Arieso.

Prior to OSE, Martin ran Gatehouse Capital for nearly ten years, a technology corporate finance boutique supporting early-stage UK technology companies.

He served as an NED for King’s Arms Yard VCT since from 2011 until 2022, and is a Director of the HDH Wills 1965 Charitable Trust.

Martin holds a BA in Geography from the University of Oxford and an MBA from Ashridge Management College.

Martin sits on the board of

  • Living Optics
  • Mixergy
  • MoA Technology
  • Salience Labs
  • Wild Bioscience

Martin is an observer on the board of

  • Fluorok
  • Oxford Quantum Circuits
  • Seloxium

Meet everyone in the

Executive Team

Ed Bussey
Ed BusseyChief Executive Officer
Heather Roxborough
Heather RoxboroughSenior Partner, Health Tech
Jack Edmondson
Jack EdmondsonChief Investment Officer
Jim Wilkinson
Jim WilkinsonChief Financial Officer
Katya Smirnyagina
Katya SmirnyaginaSenior Partner, Life Sciences
Sarah Shackelton
Sarah ShackeltonChief Talent Officer