Roper ran for school trustee in Edmonton's 1924 municipal election. He finished fourth of seven candidates, in an election in which the top three candidates were elected. He tried again the next year's election, and again finished fourth of seven candidates; however, the board's staggered electoral system meant that, though only three of the board's seven trustees had been elected in 1924, four were up for election in 1924 and Roper was elected. He was re-elected in 1927 but did not seek re-election at the expiration of his second term.