WAD43 was started in 2007 to offer expertise and consultation in Geotechnical and Hydraulic Engineering.

In 1976, Dr. Bakker attained a BSc in Hydraulic engineering in Amsterdam, after which he worked as a structural engineer for the design of the Eastern Scheldt Barrier. After attaining a degree in Concrete engineering by the Dutch Concrete Society in 1979 he continued his studie with Delft University to receive a MSc degree in Geotechnical Engineering in 1985 on the use of Plaxis for Retaining walls.

In 1985 Bakker restarted working at the Delta office of Rijkswaterstaat in the field of Hydraulic Engineering, on dike revetments and filter analysis, mainly involved with the finishing of the Eastern Scheldt Barrier.

From 1987 on he continued working on the development of Plaxis for Practical Engineering. Dr. Bakker is in the Board of the Plaxis Foundation.

From 1990 up to 2001 Dr Bakker was leading the Structural Engineering Research Group at Rijkswaterstaat, in that period he was responsible for the development of the Dutch Sheetpiling Handboek CUR 166 and organised the monitoring of the 1st large diameter bored tunnel in the Netherlands; the 2nd Heinenoord tunnel (the CUR/COB K100 project)

Since 1996 Bakker is lecturer in Hydraulic Structures at Delft University of Technology. In 2000 he received a PhD in Geotechnical Engineering for a thesis on Soil Retaining Structures. Dr Bakker presently lecutres on Tunnel engineering.

From 2002 up to 2007 Dr. Bakker was Managing Director of Plaxis BV.

In 2007 WAD43 bv was founded for Consulting in the field of Geotechnical, Hydraulic and Structural engineering.