Anjo started as a trainee at Oracle. A job was offered and the next 16 years Anjo worked for Oracle. He worked mostly with the RDBMS Performance and Oracle Parallel Server. In those 16 years he lived in the Netherlands, Ireland, Japan and the USA.

During his time with the Oracle Server Performance Group Anjo worked with many big companies that are specialized in making or selling software (Baan, SAP, Amdocs etc). He also worked at customers all over the world (like NTT, Docomo etc.) to help them improve the performance of their systems as well as implementing new systems.

 

While he was working on these performance issues he developed a tuning method called YAPP (Yet Another Performance Profiling Method) to tune Oracle systems based on response times. He is recognized as the father of the YAPP-methodology which was first documented in the YAPP white paper in 1998 and publicly used in his website oraperf.com. This method can also be used on non-Oracle SQL systems.

 

He taught at many internal Oracle classes, throughout the world. He is the author of the well known an often quoted "Oracle7 Wait Events and Enqueues" white paper, the owner and inventor of the http://www.oraperf.com website, and one of the founders of the Oaktable Network.

After Oracle he worked for Precise software Solutions for 2 year as an Oracle Technologist, and worked for Veritas Software Application Performance Management (APM) for 2 years as an Oracle Technologist where he developed performance prototype software. In September 2006 he founded Miracle Benelux.

On 12 April 2007 Anjo and his good friend Mogens Nørgaard became Oracle ACE's "which formally recognizes Oracle advocates with strong credentials as evangelists and educators in that community."