About, Contact, Legal Notice

Experienced startup operator and active early stage investor
I live in Toronto & Hamburg.

Contact: my last name @gmail.com

Main expertise: working with entrepreneurs, growing startups and generating returns.
Main interest: Making our collective operating system, our economy, compatible to our home base, our planet.

  • Since 2020, Mentor at Creative Descruction Lab, HEC Paris,
  • Since 2019, Mentor at Creative Destruction Lab, Oxford University
  • Since 2018, Digital Advisory Board, Lufthansa Innovation Hub
  • Since 2016, Mentor at Creative Destruction Lab, Toronto
  • Operator and Mentor to startup CEOs
  • Active Angel Investor in 15 AI companies in North America
    in industrial, health, finance
    (Kyndi, Darwin AI, GBatteries, Wondeur, Oncoustics full list at densityventures.com)
  • 2014-2019, Founder, CEO FLIO, global airport app 
  • 2010-2013, Founder & CEO 9flats.com vacation rental marketplace
  • 2013 bought wimdu.com, largest competitor to airbnb. Sold to Wyndham hotels.
  • 2006-2013, Founder, CEO, board member Qype.com, exited to Yelp.com
  • 2010-2017, Co-founder, Chairman avocadostore.de, eco-marketplace, sold in 2017
  • 2004-2005, COO DocMorris.com, turnaround of large mail order pharmacy.
  • 2002-2003 Product Director Bild.de, turnaround of large online media.
  • 1999-2001, Head of Northern Europe, lastminute.com, IPO 2000
  • 1994-1998, various positions Bertelsmann, founded one of the first online travel agents (OTAs) in Germany


(1) Startups: Since 1997, I have envisioned, invested in, built, restructured, exited, traded and mentored startups. If you believe that you can become an expert in anything in 10,000 hours, then I have slightly moved past that goal with more than 30,000 hours.

(2) Investing: – I invest in in public markets, in startups. I am a value investor at heart, not because it seems fashionable, but with long and hard training and sometimes painful learnings. In early stage investing, I focus on AI (machine learning). In 2016, the field was poorly understood, in 2019 it feels overhyped. I am an associate with the Creative Destruction Lab at the University of Toronto and in Oxford. 

(3) Planet: My topic of my master thesis was the commercialisation of fuel cells, I co-founded the largest store for eco friendly fashion in Germany. I believe the climate crisis can be averted, but we are not on the right track. I strive to be part of the solution and not the problem.

Legal Notice:

Density Ventures GmbH,
Am Strandkai 3,
20457 Hamburg, Germany.