Chris Wensel
Chris K Wensel has been a Software and Systems Architect for over 15 years. He is the founder of Concurrent Inc., and the author of the Cascading data processing and workflow application. Over the last 5 years he has installed large and sophisticated Nutch and Hadoop applications for use by companies providing web content and financial data services in both the traditional enterprise data-center and on Amazon EC2.

Stefan Groschupf
Stefan has been an open source activist for the last 10 years. As an early adopter and contributor of Nutch, the parent project of Hadoop, he has architected both Nutch and Hadoop solutions for several startups and government organizations in Europe and the U.S. He is also the founder of Katta, the open source distributed Lucene index project.