He represented York County in the Legislative Assembly of New Brunswick as a Progressive Conservative member from 1952 to 1967.
He was born in Saint John, New Brunswick, the son of Frederick McInerney and Ethel Murphy.
McInerney was educated at Saint Francis Xavier University and received an M.D.
He was also the deputy premier of New Brunswick under Hugh John Fleming.
And he was Doctor Chalmers partner in the starting the Polio Clinic & Health Center part of the Victoria Public Hospital in Fredericton.