He has been an independent BI consultant for many years and implemented numerous data warehouses and BI solutions for large companies. For the last 6 years he have been very busy writing an ETL tool called Kettle. This tool was open sourced in December 2005 and acquired by Pentaho Open Source BI early in 2006. As such he's now Chief Data Integration for Pentaho mainly doing lead development for Kettle a.k.a. Pentaho Data Integration.