By the middle of the nineteenth century, thanks in part to the colonial missionary movement, the colonial churches were seen in a much more positive light than they had been in the eighteenth. Instead of a destination of last resort for those who could not find preferment at home, the colonies were appreciated as a particular calling which would benefit from specialised training and, for a small number, a positive career move. This chapter considers the response that was made to the need to train this new class of professional men. It concentrates on the Church of England and the legislative means that were devised to regulate the passage of clergy in and out of the United Kingdom. It also looks at the Colonial Missionary College movement, which grew out of the demand for more flexible, as well as more specialised, professional training for those going out to work overseas. A full study of the statistical profile of the clergy of all churches in Great Britain and Ireland and the settler colonies throughout the nineteenth century is not what is attempted (or achieved) here. Instead, the aim is to indicate some of the major questions which shaped the profession, as well as the factors which encouraged particular individuals to try their hand overseas. The two chapters which follow look at two special cohorts of colonial clergy, namely, the students of St Augustine's College, Canterbury, and the missionary college of All Hallows, Drumcondra, in Dublin.