Born in Ottawa in 1949.
Obtained an M.A. from the University of Ottawa in 1971 and a Ph.D. in 1979 (French Literature).
Worked as a professor and writer until 1981 where she became the president of Poasis Properties Ltd. in Ottawa, Ontario.
First Poet Laureate of the City of Ottawa in 1982. The post was created to "help promote the City of Ottawa as well as enrich the lives of its citizens". It was Mayor Marion Dewar who made the position official, and named Ahearn the first Ottawa poet laureate; Ahearn wrote six poems a year for three years, and attended various civic and community group functions across the city.