After his arrival in New Zealand, Devitt worked on the building of the
Tasman pulp and paper mill at
Kawerau. In the 1970s and 1980s, he served as the secretary of the Wellington branch, and then national secretary, of the Boilermakers' Union. During this period, the union was involved in a number of high-profile disputes involving heavy engineering projects—most notably the building of the
BNZ Centre in Wellington and the expansion of the
Marsden Point Oil Refinery and the pulp and paper mills at
Kinleith and Kawerau—and the Wellington and Kawerau branches were deregistered by prime minister of the day
Rob Muldoon. He became the head of the New Zealand Trade Union Federation, which later merged into the
New Zealand Council of Trade Unions. ==References==