Carroll stepped down on April 5 to run in the provincial election as the Liberal candidate in the riding of Don Valley North. She served as the area councillor for 15 years before resigning.
City council decided to fill the seat by appointment versus holding a byelection since the current term of office ends at the end of November. The municipal election will be held on Oct. 22.
Tsao, who said he works at Children’s Mental Health Ontario, was one of 18 applicants to fill the position.
“I’ll ensure that their voices continue to be heard at city hall during this time of transition in the ward,” Tsao said.
He said he would take a leave from his current position and go back to his job after the term finished.
Ward 33 — Don Valley East is roughly bounded by the Don River, Finch Avenue East, Victoria Park Avenue and Highway 401.
There are only three council meetings left in the term after Tuesday’s special meeting.