Sebastian Lopienski works at CERN in the IT Department, designing and developing software to facilitate managing and supporting computing services hosted in the CERN Computer Centre. He is also a member of the CERN Computer Security Team, where his duties include incident analysis and response. During his work at CERN since 2001, he has had various assignments, including development of applications for accelerator controls in Java, and providing Central CVS Service for software projects at CERN. He graduated from the Computer Science Faculty of Warsaw University in 2002 (Master's thesis on Distributed Computing in Java). His professional interests include software and network security, cryptography, and distributed systems.