Marek is a core member of the Keystone core team, working on a CERN and Rackspace joint project. He focuses his efforts on building hybrid clouds.  Marek was one of the contributors for Icehouse Federation, Keystone2Keystone as well as implemented client side of the federation suite. Marek is carrying on working on the further cloud federation challenges, including keystone-to-keystone federation.  He holds M.Sc degree in Computer Science from Warsaw University of Technology, where he worked on Data Mining in Computer Securityresearch.  In his spare time Marek plays drums, rides a bike and occasionally hikes Swiss mountains.