Public sector information technology projects are important for delivering government policy, and one reason for their failure is lack of effective engagement between stakeholders. But current literature is unclear on what engagement is. The study examined engagement in five cases of successful project development, collecting data though documentation and semi structured interviews with internal clients and external IT consultants. Thematic and template analysis was used. Findings identified six interacting components of engagement to be three conditions of environment, participants and expertise that afford three interacting and cycling behaviours of sharing, sense making and adapting. The research thus contributes an original model of engaged behaviour that draws attention to components that help enactment of engagement between participants on IT projects.