During the First World War, Rushall worked as
harbourmaster at Rangoon's harbour, although on 10 May 1921 he was initiated as a freemason into the Lodge of Rectitude in Rugby. In December 1922 he was elected as an honorary magistrate in the Rangoon Municipal Elections, whereupon he devoted himself to the improvement of the city's public parks and war memorial. He worked for eight years as a councillor of the Corporation of Rangoon, and was subsequently made an MBE for his distinguished service during the war. He served as chairman of the Roads and Buildings Committee, and also sat on the committees for public health and markets, playgrounds, and the protection of
waifs and strays. As a result of his public service in Rangoon, Rushall became known to
Thibaw Min, the last king of Burma's
Konbaung dynasty, and in 1925 he attended the funeral of
Supayalat, the king's favourite wife. From 1928 he was vice president of the hospital and governor of
Rangoon University. Other public offices that he held included governor of the
gaol and member of the Reformatory School Board. On 6 January 1930, Rushall became the first Englishman to be elected mayor of Rangoon, and was seen as a popular choice for the position – at the time, Singapore's paper
The Straits Times described his election as having given "universal satisfaction". According to the
Rugby Advertiser, Rushall was "extremely popular both among the European and the native population of the city", and was "well known for his numerous acts of kindliness and charity".
(pictured) in March 1930.|alt= Rushall's first year as mayor proved to be challenging: in March he was compelled to give evidence at the trial of
Jatindra Mohan Sengupta, the mayor of
Calcutta, who was accused of sedition in speeches he had made during a visit to Rangoon. During the trial a riot erupted outside the courthouse. Sengupta was subsequently acquitted. In May, further riots—this time of anti-
Burmese Indian sentiment—sprung up in Rangoon and across the rest of the country following a strike by Indian
coolies. One such riot lasted throughout the night of 26 May, and resulted in the deaths of 120 Indians and more than 900 injuries. When Rushall's son Richard came to visit him during this time, Rushall immediately sent him up the
Rangoon River and away from the civil disorder for 2–3 months. Also in 1930, Rushall gave a banquet for which he commissioned the Burmese painter
Ba Nyan to make individual paintings for each of the 80 guests' menu cards. Ba Nyan submitted
gouaches of street signs and sailing ships. In November, Rushall supported a resolution to improve the accommodation and quality of care in the city hospital, and, from 6 April 1931, he sat on a committee to ensure that a fair share of stevedoring jobs in Rangoon were allotted to native dock labourers. That same year, he was a member of the
Burma Research Society. ==Later life and death==