The Supervisory Board of Janssen de Jong Groep consists of the following members:

Hans Smits

Hans Smits studied Civil Engineering at Delft University of Technology and he studied Business Administration at the interfaculty of Rotterdam. Hans Smits worked as President Director at the Port of Rotterdam Authority N.V., was Chairman of the Executive Board at Rabobank Nederland, President Director at Amsterdam Schiphol Airport and Secretary General of Transport, Public Works and Water Management. In addition to his many years of management experience in – amongst others – the construction sector, Hans Smits adds a broad strategic and organizational background.


The Board of Directors of Janssen de Jong Groep consists of two members:

Ivo van der Mark, CEO

The strength of a strategy is not only the plan, but also the knowledge of all the scenarios that have fallen away….


  • New Board Member at Nyenrode Business University
  • Commercial Engineer Architecture at De Haagse Hogeschool/The Hague University of Applied Sciences
  • Structural Engineering Business Administration at Avans University of Applied Sciences Tilburg

Work experience:

  • Employed at Janssen de Jong Groep since 2013, of which General Manager of the Cluster Business Premises since 2016
  • 6,5 years Senior Commercial Manager at Heembouw