I have been an independent BI consultant for many years and implemented numerous data warehouses and BI solutions for large companies. Since 2001 I have been very busy writing an ETL (Data Integration) tool called Kettle. This tool was open sourced in December 2005 and acquired by Pentaho Open Source BI early in 2006. I was the Chief Architect of Data Integration for Pentaho and later Hitachi Vantara for 12 years. Now I’m the Chief Solutions Architect at Neo4j.