Certified Developers

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



phone +49 (89) 14360 -454 (en) or -444 (de)

Armin le Grand
David Ostrovsky
Jürgen Funk
Katarína Behrens
Oliver Specht
Samuel Mehrbrodt
Thorsten Behrens





phone +44 (0)1223 362967

András Timár
Ashod Nakashian
Henry Castro
Kohei Yoshida
Jan Holesovsky
László Németh
Marco Cecchetti
Michael Meeks
Miklos Vajna
Noel Grandin
Pranav Kant
Tamás Zolnai
Tomaž Vajngerl
Tor Lillqvist



phone +34 981 913991

Jacobo Aragunde Pérez



phone +49 (7031) 3892506

Eilidh McAdam


Landeshauptstadt München

Jan-Marek Glogowski


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



Andrzej Hunt
Giuseppe Castagno
Khaled Hosny
Lionel Elie Mamane
Luboš Luňák
Marcos Souza
Mark Hung
Markus Mohrhard
Matúš Kukan
Mihai Varga
Muthu Subramanian
Philippe Jung
Pierre-Eric Pelloux-Prayer
Radek Doulík
Rene Engelhard
Rob Snelders
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 info@documentfoundation.org.

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.

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