By 1819 he owned a 46-ton sealing schooner, had acquired numerous properties on the St John's waterfront and was running a thriving import business.
Between 1820 and 1832, he was a member of the political committee During that period he was part of the colony's struggle for representative government.
A Roman Catholic, Doyle held a number of positions with the Benevolent Irish Society.
He also did work for charities involved with orphans and assisted the local church in finding a site for the new cathedral.
Doyle was a successful businessman who spent much of his time improving the situation for his fellow countrymen.