LibreOffice Certified Developers

LibreOffice Certified Developers are individuals who have proven their ability to master LibreOffice code - to develop new features; provide L3 Support to enterprise users; research and develop solutions to new or unknown issues, design and develop one or more courses of action to correct these issues, evaluate each of these courses in a test case environment, and implement the best solution to the problem. Once the solution is verified, it is delivered to the customer and given back to the community.

Certified Developers are present TDF members, are nominated by the Certification Committee, and subsequently peer-reviewed by the Engineering Steering Committee.


  • Bjoern Michaelsen


  • David Ostrovsky
  • Katarína Behrens
  • Samuel Mehrbrodt
  • Thorsten Behrens


  • András Timár
  • Andrzej Hunt
  • Jan Holesovsky
  • László Németh
  • Lubos Lunak
  • Michael Meeks
  • Miklos Vajna
  • Tomaž Vajngerl
  • Tor Lillqvist


  • Adam Fyne


  • Muthu Subramanian


  • Jacobo Aragunde Pérez


  • Eilidh McAdam


  • Faisal M. Al-Otaibi

Landeshauptstadt München

  • Jan-Marek Glogowski


  • Maxime de Roucy

Red Hat

  • Caolan McNamara
  • David Tardon
  • Eike Rathke
  • Michael Stahl
  • Stephan Bergmann


  • Cedric Bosdonnat
  • Fridrich Strba
  • Noel Power
  • Petr Mladek

The Document Foundation

  • Christian Lohmaier


  • Khaled Hosny
  • Kohei Yoshida
  • Lionel Elie Mamane
  • Marcos Souza
  • Markus Mohrhard
  • Matúš Kukan
  • Noel Grandin
  • Pierre-Eric Pelloux-Prayer
  • Radek Doulík
  • Rene Engelhard
  • Rob Snelders
  • Tamás Zolnai
  • Winfried Donkers

Notes on the aforementioned entries: our list of certified developers is for your information, alphabetically sorted, and not necessarily complete nor up-to-date. Specifically, TDF does not recommend nor endorse any of the listed companies. Interested parties are asked to assess individually if the listed companies are suitable for their respective requirements. If you notice mistakes or inaccuracies, please inform us at

This list is a small subset of those who have committed code to the project, and a subset of those with commit rights who can commit code to the project. This list is expected to grow over time, as more of the existing contributors go through the certification process.