From 1960 - 69 , he was chairman of British Petroleum .
In 1939 , Bridgeman was petroleum advisor to the Ministry of Economic Warfare , and , from 1944 -- 46 , as Principal Assistant Secretary to the Ministry of Fuel and Power .
From 1960 - 69 , Bridgeman was petroleum advisor of British Petroleum .
In 1939 , Bridgeman was petroleum advisor to the Ministry of Economic Warfare , and , from 1944 -- 46 , as Principal Assistant Secretary to the Ministry of Fuel and Power .