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
Steve Kent, Head of Office IT Support, since June 2009 (until November 30, 2009)
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.