Integrity of government organizations and institutions is one of the key pillars of successful democracy. In this paper we present an approach to perform an integrity assessment in a group setting. We present a case study in which we trained two groups of practitioners to execute the integrity risk assessment according to the Collaboration Engineering approach to collaboration support. We compared their effort and results with the assessment executed by professional facilitators. For this comparison we collected data mainly from a participant perspective. The preliminary results show that there is no significant difference between the performance of the practitioners and the professional facilitators.