 He operated a bakery and restaurant business until his death.St Omer was a councillor for 11 years and the mayor of Queenstown Borough from 1887 to 1891 and 1894 to 1903.In 1863, to assuage the treeless landscape, St Omer planted ‘weeping willow’ trees around the edge of the lake in Queenstown Bay and with his son Frank, and Lewis Hotop the chemist, planted amenity trees all around Queenstown.