The use of building information modelling (BIM) has opened up for new roles. Previous studies on BIM roles focused on their duties, formal responsibilities and legitimacy, but few studies pay attention to how BIM actors (BIM coordinators and strategists) act to support increased BIM usage. Applying the theoretical construct of institutional work, this paper aims to create an understanding of the role and agency of BIM actors. Based on observations and semi-structured interviews with BIM actors and managers, the findings show: (1) purposive actions of BIM actors to promote and diffuse new BIM practices; (2) tensions between creating new BIM practices and maintaining existing construction management institutions; (3) BIM actor as an interface between the BIM technology and its users. Focusing on the BIM actor's role and agency gives insights into the hard process of changing and/or disrupting traditional construction management institutions and creating new practices arising from increased digitalization.