He became senior partner of the family firm, Birkmyre Brothers, in Calcutta and also served on the Viceroy of India's Legislative Council and the Bengal Legislative Council.
He was Vice-President of the Bengal Chamber of Commerce.
Birkmyre was knighted in 1917, appointed Commander of the Order of the British Empire (CBE) in 1918, and created a baronet in the 1921 New Year Honours.He died at the age of 59.