In 1986 Deane became Chairman of the State Services Commission, effectively the head of New Zealand's public service. Along with Minister of Finance Roger Douglas, Deane served as the principal architect of state-sector reform and corporatisation of New Zealand's State-Owned Enterprises. He also oversaw a range of other reforms to the public sector, including changes in the wage determination processes to liberalise these, the re-organization of the public service to reduce substantially the number of public servants and to improve the efficiency of many government departments, and changes designed to improve the clarity of objectives and the enhancement of accountabilities within the public sector.