If you have ever looked at a stock quote on the Internet, chances are you have used a system that Hans Jespersen had a hand in creating. For the past 20 years, Hans has been working with infrastructure hardware and software at pioneering Silicon Valley companies including Sun Microsystems, Yahoo, eBay, and TIBCO Software. The systems that Hans has been designing, implementing, and evangelizing are usually very large scale distributed systems based on leading edge technologies. Hans is a subject matter expert in Enterprise Architecture and Integration, Enterprise Search, and more specifically the emergence of Web Services standards, Service Oriented Architecture (SOA), and Event Driven Architecture (EDA).