When his father, Sir Michael Bruxner, retired from parliament on 5 February 1962, Bruxner gained preselection for his father's vacated seat of
Tenterfield, allegedly against his parents' advice, and won it at the
1962 election for the
Country Party with 50.75% of the vote. Serving in the backbenches in opposition, Bruxner was re-elected at the 1965 election with an increased margin of 57.1% of the vote. On 17 December 1975, in addition to his responsibilities for Decentralisation and Development, the new Premier,
Tom Lewis, appointed him as the Minister for Tourism, which had been vacated by Cutler. A month later, on 22 January 1976, Lewis was deposed as Premier and Liberal Leader by several backbenchers and was succeeded by Education Minister
Sir Eric Willis. Willis then appointed Bruxner as Minister for Transport and Minister for Highways in his new government on 23 January. As the new Minister for Transport and Highways, Bruxner was the fourth Minister of that portfolio in a year and started amid speculation that he had been given the job to take the mess of transport, which was largely seen as a 'bad news' portfolio, away from the Liberal Party and offload it to the Country Party. Nevertheless, Bruxner took it in his stride, adopting his father's maxim that "We can't please everyone. Let us... go like the devil straight ahead." and oversaw the announcement of the Premier's Sydney Transport masterplan. Inheriting a department that was in "dire financial straits", Bruxner found it difficult to make an impression before the Willis Government was defeated at the
election on 14 May 1976. ==Later life==