He represented 5th Queens in the Legislative Assembly of Prince Edward Island from 1986 to 1996 as a Liberal.
[3] In his early career, he was manager of the Ontario Vegetable Board for five years, worked as a marketing consultant in Western Canada and P.E.I.,[4] and was an assistant professor at St. Francis Xavier University and the University of Prince Edward Island.
[3] Carroll entered provincial politics in 1986, when he was elected a councillor for the electoral district of 5th Queens, defeating Progressive Conservative incumbent Wilfred MacDonald.
[5] On May 2, 1986, Carroll was appointed to the Executive Council of Prince Edward Island as Minister of Agriculture.
[9] Following his political career, Carroll continued to teach at the University of Prince Edward Island, where he is an assistant professor in the School of Business.