Elmer Walter Iseler, OC OOnt (October 14, 1927 – April 3, 1998) was a Canadian choir conductor and choral editor.
[2] Iseler sang in the Toronto Mendelssohn Choir under the baton of Sir Ernest MacMillan, and in 1951-52 he apprenticed as an assistant rehearsal conductor.
In 1952, Iseler found work teaching orchestral and choral music in Toronto high schools, an occupation he continued until 1964.
In 1964, Iseler succeeded Walter Susskind as conductor of the Toronto Mendelssohn Choir, a position he held until 1997.
"He brought to the Festival Singers and the Mendelssohn Choir fresh discipline and versatility, eliciting stylistic resilience, fine tuning, and a healthy sound adaptable to music of all periods.