About our team


Gerrit Rooks is Professor Research Methodology at Makerere University Business School (Uganda) and Assistant Professor Sociology of innovation at Eindhoven University of Technology. His main research interests are performance implications of buyer-supplier relationships, entrepreneurship, in particular the relationship between personality, networking behavior and network characteristics of entrepreneurs. He published his work in journals such as Psychological Methods, European Sociological Review, Journal of African Economies, Journal of Management and Governance and the Journal of Supply Chain Magement.

Regien Sumo is a doctoral researcher at Eindhoven University of Technology. She obtained an  MSc in Strategic Management from Tilburg University. Her current research interests include formal governance and innovation in inter-organizational relationships. Regien Sumo is the PhD researcher in the subproject ‘The effects of Performance Based Contracts on Innovation’.

Jan Telgen is Professor at the University of Twente and holds an MSc in Econometrics and a PhD in Economics from Erasmus University Rotterdam. His research focuses on the efficient use of public procurement methods to be both effective and achieve policy goals. Topics that he published on include the optimal number of bidders, public provision of social services, procurement control, horizontal cooperative procurement and supplier selection mechanisms.

Wendy van der Valk is Assistant Professor Supply Chain Management at Tilburg University with a main expertise in the area of business-to-business service procurement. Her work has been published in amongst others the International Journal of Operations and Production Management, Industrial Marketing Management, the Journal of Supply Chain Management and the Journal of Purchasing and Supply Management.

Arjan van Weele holds the (parttime) NEVI-Chair of Purchasing and Supply Management, at Eindhoven University of Technology, Faculty of Industrial Engineering and Innovation Sciences (IE&IS). He worked for many years in education and research programs at Eindhoven University of Technology and Nyenrode University. Is/was related as visiting professor to several (international) management development programs, such as TIAS-Nimbas School of Management, (The Netherlands), Vlerick Gent Leuven School of Management (Belgium), University of Stuttgart (Germany), and European Institute of Purchasing Management (France). Over the last 15 years he has published over 100 articles and 15 books on purchasing and supply management.  

Finn Wynstra is Professor of Purchasing and Supply Management at Rotterdam School of Management, Erasmus University, and also holds a chair endowed by the Dutch Association for Purchasing Management (NEVI). His main research interests are buyer-supplier collaboration in new product development and procurement of services, and he has published among others in Journal of Operations Management, Journal of Purchasing and Supply Management, Journal of Product Innovation Management and International Journal of Research in Marketing. Finn Wynstra is project-leader for PBC in Service Triads.

Fabian Nullmeier is a research and teaching associate at Rotterdam School of Management, Erasmus University. He obtained a MSc. in Supply Chain Management as well as Accounting, Auditing and Control at Erasmus University. His current research interests include performance-based contracting in the public sector. 

Hülya Türksever was part-time doctoral researcher at Rotterdam School of Management, Erasmus University. She has a master in Business Administration and holds several certifications for auditing procurement processes in the Dutch public sector. Momentarily she is engaged at the Dutch Association for Purchasing management (NEVI) where she is responsible for Sales Support & Innovation. Hülya Türksever focused her PhD research project on ‘Contracting Capabilities and the use of Performance Based Contracts’.