McKerron joined the Malayan Civil Service in 1920 was appointed as acting Assistant Superintendent in the Monopolies Department. Between 1922 and 1924, he was a District Officer in Jasin, Malacca. In January 1925, he was appointed as District Officer, Assistant District Judge and Police Magistrate. In 1928, he was the British Resident to Brunei. In 1932, he was the Secretary of F.M.S. Retrenchment Committee and in the following year, he appointed Superintendent of Taiping Convict Establishment. Between 1934 and 1936, he was the Assistant Adviser and Superintendent of Prison of Kedah. In 1938, he was the Under Secretary in Straits Settlement and First Assistant Secretary.
Second World War
In February 1939, McKerron was in charge of the Manpower Bureau for voluntary service for Malaya. It was an appeal for British Europeans to enroll in the volunteer force in the event of emergency. The objective of the registration is avoid the tragic mistakes of the First World War when thousands of men enlisted and went to the front who would have been of far greater value to the country in their civil posts. By mid-April, about 2500 British Europeans enrolled for the voluntary service. McKerron was later appointed as Press Censor in September 1939. In 1940, McKerron was appointed as member of the Advisory Committee on the formation and organisation of Defence Corps in Singapore. This was partly due to McKerron was an army officer prior to his civil career.
Post Second World War
During the period of British Military Administration in Malaya in 1945–1946, Brigadier McKerron was the Deputy Chief Civil Affairs Officer in Singapore, assisting Major-General Sir Ralph Hone. After the Military Administration ended on 31 March 1946, McKerron was sworn-in as the 1st Colonial Secretary of Singapore on the following day. During his tenure as Colonial Secretary, McKerron was sworn-in as Officer Administrating the Government when Sir Franklin Gimson was away in England for a period of 5 months in 1947. He retired on 29 April 1950 as Colonial Secretary and handed over to J D M Smith, whom became the Acting Colonial Secretary. Wilfred Blythe was later sworn-in as the 2nd Colonial Secretary of Singapore on 30 June. McKerron was later the President of the Association of British Malaya in 1953.
Awards and honours
McKerron was invested with Companion of the Most Distinguished Order of St. Michael and St. George in 1945 in recognition of his work in the Malayan Planning Unit during the war in Malaya. In 1950, he also received Knight Commander of the Most Excellent Order of the British Empire for his 30 years of service in Malayan Civil Service.
Personal life
Patrick McKerron was born in Aberdeen, Scotland, UK on 6 May 1896. He is the eldest son of Professor and Mrs R. G. McKerron. McKerron's first marriage was with Ernestine Bickford Pearce, daughter of Mr and Mrs Ernest V Pearce of Baxterley, Nathan Road on 21 April 1924. McKerron's second marriage was with Majorie Mennedy Rettie, youngest daughter of Mr and Mrs A T Rettie of Spring Valley, Badulla, Ceylon on 29 April 1933. McKerron has a son and a daughter from his marriage. McKerron died in London on 20 March 1964.
