Our People

Our People

Left to right: André Leeuwis, Michel de Haan, Johan de Vries, Ton Heijmans and Kurt van Dijk.

Drees & Sommer Netherlands
As of July 1, 2020, BOAG and Drees & Sommer Netherlands have joined forces. The board of directors consist of five managing directors:

  • Michel de Haan (chair)
  • Ton Heijmans
  • Johan de Vries
  • Kurt van Dijk
  • André Leeuwis

The managing directors lead the Dutch daily operations and the business lines with a team of approx. 100 employees: team leaders, project managers, consultants, specialists and the back office. They work from three locations: Amsterdam, Rotterdam and Eindhoven.

Contact Drees & Sommer Netherlands:


+31 (0)88 776 26 70

Drees & Sommer Group
As a holding company, Drees & Sommer is the owner of the independent operational units of the Drees & Sommer Group. The operational units are either regional companies or Expert Teams with wide-ranging autonomy. The entire Group uses the network to add value for clients.

The main shareholders in Drees & Sommer SE are the active and former Partners, each of whom has a minimum shareholding. All Partners have joined together to form a consortium whose constitution safeguards the long-term continuity of the company’s development. As a result, the company is independent of third parties. Currently, Drees & Sommer is managed by two Partners acting as the Executive Board in close cooperation with the operational Partners and the Managing Directors. The Partners are have committed to maintaining the company’s successful strategy and corporate culture.


Click here to get more information about the corporate management of the Drees & Sommer Group.

Supervisory Board

  • Prof. Dr. Hans Sommer (Chairperson of the Board)
  • Dr. Johannes Fritz (Vice Chairperson)
  • Dr. Bernd Gaiser
  • Eva Dietl-Lenzner
  • Ulrich Dietz
  • Volker Mack