Prior to entering politics, Duby worked as a real estate manager and public servant in the ACT Administration.
[5] The anti-self-government movement carried significant popular weight; an advisory referendum held in 1978 concluded that only 30.5 per cent of electors were in favour of self-government;[6] and Duby plus two other members of his No Self Government Party and a representative of the Abolish Self-Government Coalition were elected to the inaugural 17-member Assembly.
Duby resigned from the No Self-Government Party, along with Carmel Maher and David Prowse, to form the Independents Group on 3 December 1989.
Commenting on the Duby dome in 1996, Liberal leader Gary Humphries said:[9] The words of some great sage spring to mind: "Things that men do live after them".
I am afraid that there is very little else in the Territory that will live after Mr Duby, so to do away with his one remaining monument in the Territory would be a great pity, Mr SpeakerIn the last days of the Kaine ministry, Duby served as Minister for Housing and Community Services; and then, for part of one day, as Leader of the Opposition.