About Our Wikibase Team
The Wikibase team is made up of a leading group of international Wikibase experts active in the community.
The team have skills and experience across software development, hosting, data modelling, information architecture, system administration and the GLAM domain.

Jeroen De Dauw
Wikibase developer
Part of the original Wikidata team and core Wikibase developer. A long term Software Architect at Wikimedia Deutschland. Created the first commercial Wikibase hosting and the first third-party Wikibase extensions.
Berlin

Karsten Hoffmeyer
Wikibase platform expert
Karsten has extensive expertise in all things MediaWiki, the platform on which Wikibase is built. Karsten has over a decade worth of experience with wiki consulting and is organizational director of Professional Wiki.
Berlin
Alaa Sarhan
Wikibase developer
Alaa is one of the few people with significant Wikibase development experience. He is passionate about best practices, modern tech stacks, user-centric design and Agile practices.
Berlin
Lozana Rossenova
Data modelling expert
A digital designer and expert in data modelling, information architecture and user experience. Lozana is very familiar with the GLAM domain and extremely active within the Wikibase community. Learn more.
Berlin
Tobias Oetterer
Wikibase Platform Expert
Tobias is a well rounded MediaWiki expert. He is an experienced wiki administrator, has set up multiple wikis and has created his own MediaWiki extensions.
Germany
Iván Hernández-Cazorla
Structured Data expert
Iván is specialized in cultural heritage and digital humanities. He has been providing both MediaWiki and Semantic MediaWiki services for many years. He is also active in the community and is familiar with Wikidata.
Las Palmas
Wouter Rademaker
Wiki expert
The Netherlands
Julie Boschat Thorez
Wikibase Platform Expert
Julie’s main focus is the cultural sector in which she has worked with archives and libraries. Her skills include the setup and maintenance of Wikibase and Wikibase training programs.
The Netherlands
Stephan Gambke
Wikibase Platform Expert
Stephan is a veteran wiki developer. He created several extensions and is the author of the popular Chameleon skin. Stephan has been involved with the structured data in wikis for over a decade.
Paris
Sandra Fauconnier
Data modelling expert
Sandra is an art historian with over two decades of experience with digital projects in the cultural sector. She worked as GLAM specialist for the implementation of structured data on Wikimedia Commons.
Rotterdam
You?
TBD
We are searching for more talent! If you are looking to join the Wikibase team, have experience with MediaWiki, Wikibase, Wikidata or DevOps, contact us.
The Wikibase Consultancy is a collective of Wikibase consultants and is run by Professional.Wiki.

The Wikibase team have Helped
German National Library
Working with the German National Library on their structured authority data, to make it easier to access and more interoperable. This makes Wikibase attractive for the ~1000 institutions using the GND.
Wikimedia
We have completed various projects at and for Wikimedia. This includes creation of Wikidata, development of the Wikibase software, contributions to MediaWiki core and creating MediaWiki extensions.
Rhizome
Rhizome champions digital art and culture. It was an early adopter of Wikibase and has been using the software since 2015. We have developed the Wikibase Local Media extension for Rhizome.
The Wikibase Consultancy Misson
We strive to accelerate adoption of Wikibase and to provide the best professional services available from our Wikibase team.
The Wikibase Consultancy Values
We like open source and open data, and have a strong track record of contributing to the community.
In our work we care about quality and sustainability, while remaining pragmatic. We aim to build long term, win-win collaborations with our clients. The Wikibase team will provide sustainable solutions and holistic services.
