If needed, I can provide all reference letters from previous roles, unfortunately only one of them is in English language.

Credit Suisse, Unixteam, February 2010 to May 2012

  • Heinz Wernli (Department Head Trading & Sales Unix)

T-Systems Switzerland, Unixteam, June 2012 to May 2014

  • Peter Herzig (Head of OSS)
  • Thomas Vester (Enterprise Solutions Architect)
  • Steven Henzen (Senior Enterprise Architect)

Bank Vontobal AG, Core Platforms / Unix Engineering, June 2014 to today

  • Patrick Griesshaber (Security Engineer)

Rheinwerk Verlag (Publishing Company)

  • Dr. Christoph Meister (Senior Editor Computing)

Open Source Project Taskwarrior

  • Paul Beckingham (Founder and Project Lead)