Biographical Sketch: Tim Hahn is a Distinguished Engineer at IBM and has been with IBM for 21 years. He is the Chief Architect for Enterprise Modernization Tools within the IBM Software Group Rational organization. He is responsible for strategy and execution for Rational's Enterprise Modernization products which bring innovative and vibrant technology to meet the needs of a diverse user community focused on Enterprise Modernization. Tim previously worked in the IBM Software Group Tivoli organization as the Chief Architect Secure Systems and Networks, working on security product strategy, architecture, design, and development. Tim has worked on a variety of products in the past including lead architecture, design, and development for the IBM Encryption Key Manager and the z/OS Security Server LDAP Server. Tim's expertise is multi-faceted including application development tools and techniques, software security, directory services, and System z systems. Tim has published numerous articles discussing the usage of Rational and Tivoli Security products in end-to-end deployment environments and is a co-author of two books: “e-Directories: Enterprise Software, Solutions, and Services” and “Mainframe Basics for Security Professionals”.