The Wikimedia Foundation currently has a small paid staff working out of a main office in San Francisco, California. Several staff members also work remotely. Everyone else involved with the Wikimedia projects is a volunteer, including members of the Board of Trustees.
Mark Bergsma, Networking Coordinator, since September 2006
Michael Dale works in the San Francisco office on open source video collaboration technology. His work is sponsored by Kaltura, Inc. (see related blog post)
Fred Vassard, System Administrator, since March 2009
Hampton Catlin, Software Developer - Mobile, since November 2008
Naoko Komura, Head of UX Programs, since January 2010
Trevor Parscal, Lead Front-end Developer, UX Programs, since February 2010
Guillaume Paumier, Product Manager - Multimedia Usability Project, since December 2009
Parul Vora, Interaction Designer - Wikipedia Usability Project, since February 2009
Nimish Gautam, Software Developer - Wikipedia Usability Project, since July 2009
Neil Kandalgaonkar, Software Developer - Multimedia Usability Project, since January 2010
Wikimedia Strategic Planning
Eugene Eric Kim, Program Manager, since July 2009. Eugene is consulting with Wikimedia for the duration of the Strategic Planning project on behalf of Blue Oxen Associates.