Bullock was appointed manager of Bury in 1935 and remained in the role until leaving to join
Chesterfield in 1938. He managed the club for one season before the outbreak of
World War II and remained in charge during the hostilities. During the war, he worked as an analytical chemist for Staveley Coal and Iron Company. He returned to Bury in 1945, In December 1949, Bullock was appointed manager of Second Division side
Leicester City, replacing
Johnny Duncan. Upon his arrival, he outlined his "five-year plan" with the goal taking Leicester into the
First Division. Bullock set about restructuring the playing squad, replacing several senior players who he deemed to hold too much power at the club, and implemented several new rules at the club. These included players being banned from riding on motorcycles. However, his side struggled to adapt to the First Division and by the end of the year the team was placed in the relegation zone. With Bullock's position already under threat, the club's record signing
Johnny Morris was given a 14-day ban by the board for a breach of discipline. The ban was designed to force Bullock into resigning, which ultimately succeeded. Despite his departure, Bullock was allowed to live rent free for three months in the house provided by the club and received £1000 compensation. Leicester remained manager-less for the remainder of the season with the board taking over responsibility for the team selection and were relegated to the Second Division. ==Later life==