This paper will show that the colonial project in south Dutch New Guinea was a joint project in which evangelisation, education, ‘civilisation’ and ‘pacification’ were taken up by the Dutch Catholic mission in close collusion with the colonial government. This was also a project in which a few Dutch missionaries deployed many goeroes (teachers) from elsewhere in the Dutch East Indies. These goeroes had an important position assigned to them by the Catholic mission and colonial government in the development of the Papuans and the area. This colonial structure utilised by both Dutch colonial administrators and missionaries has been labelled in the literature as a system of ‘dual colonialism’. Drawing on records held in missionary and colonial archives, the paper explores this dual colonial structure by analysing the roles of Catholic goeroes from the Kei and Tanimbar islands. This is done by taking Felix Driver’s concept of local intermediaries as the point of departure. While this concept makes visible the key role of goeroes, it is not without its issues, which will also be explored.