Malcolm M. Mercer is a Canadian lawyer who served as Treasurer of the Law Society of Ontario from June 2018 until June 2020. He was first elected as Treasurer of the Law Society on June 28, 2018, and re-elected on June 27, 2019. The Treasurer is the highest elected official of the Law Society of Ontario, which regulates Ontario’s 50,000 lawyers and paralegals in the public interest. The Treasurer presides over Convocation, the Law Society’s governing board, chairing and setting the agenda for its meetings and establishing Convocation committees. The Treasurer is elected each year at the June meeting of Convocation. Treasurers generally serve two terms.