The Foundation consists of a Supervisory Board which oversees the public function and social impact of Madaster. The different backgrounds of the independent board members ensure a wealth of experience with respect to the circular economy, supervisory and management of social impact organisations and the real estate sector. The daily management of the Foundation is taken care of by a Management Board. An Advisory Board with an advisory role to the board members is scheduled to be installed at a later stage.

Our Supervisory Board Members

Ken Webster: Ken has a background in economics education and resource issues. His most recent book is The Circular Economy: A Wealth of Flows (June 2015, 2nd Edition 2017) which relates the connections between systems thinking, economic and business opportunity and the potential for a circular economy. He is currently a Senior Lecturer at the University of Exeter Business School, Centre for Circular Economy. Ken worked with the Ellen MacArthur Foundation from January 2010 – 2018 as Head of Innovation.

Carol Lemmens: Carol is an experienced executive (board-level). Enterprising and accountable in his performance. Comprehensive and original thinker. Initiator and push factor in teams: ‘result oriented through team performance’. Extensive experience in strategy, business development and (sustainable) business. Knows his way in relevant networks in profit and non-profit. Feels at home in technological, industrial and service oriented environments. Work experience in numerous organisations and thus cross- sectorial look. Internationally active in partnerships. Carol is Director and Global Leader Advisory Services at Arup.

Lex de Boer: Lex is highly experienced in the real estate and housing sector. He currently has the position of Board Member of Lefier, a not for profit social housing corporation with a portfolio of over 30.000 housing units, and more than 300 commercial and social real estate objects. Lex was one of the initiators of Stroomversnelling, a Dutch initiative to reduce the energy consumption of residential real estate and is supervises a large (health)care organization.

The Supervisory board meets 4 times a year. Currently the management board consists of Thomas Rau (chairman) and Pablo van den Bosch (secretary and treasurer) with support of the Foundation Director Stefan van Uffelen. Both Thomas and Pablo will transfer their formal functions this year to new management board members.

The structure and set up of Madaster Foundation is further detailed in the memorandum ‘Madaster Foundation Structure’. This document contains the agreed terms and conditions for a.o. the appointment of supervisory board members, the relation between the management board and supervisory board, the independence of supervisory board members, their yearly evaluation criteria and overall transparency.

Visiting address

De Groene Afslag
Amersfoortsestraatweg 117
1251 AV Laren

Email and Phone
+31 85 060 1242


IBAN Madaster Foundation:
NL32 TRIO 0338 4665 09
RSIN Madaster Foundation:
Chamber of Commerce: