Adam Giambrone has admitted to 'multiple' affairs with women other than his partner. (CBC)

Embattled Toronto Transit Commission Chair Adam Giambrone plans to stay on as the head of the transit agency despite calls from a number of politicians for him to step down.

Giambrone, the councillor for Ward 18 Davenport, on Wednesday chaired his first TTC meeting since dropping out of the mayoral race last week.

His decision to quit the race was sparked by his admission that he had a number of intimate relationships with women other than his live-in partner, Sarah McQuarrie.

That admission prompted a number of prominent city figures to call for his resignation, including TTC board member Peter Milczyn, top mayoral candidate George Smitherman and Coun. Brian Ashton.

But in his first comments to the media since last Wednesday's announcement, Giambrone told CBC Radio's Here and Now that he wasn't going anywhere anytime soon.

"No, I'm back on the job here," he said. "There's lots of work to do. I've talked with the mayor, and he's said that I need to keep doing this, and I'm looking forward to continue to work to improve the TTC."

Mayor David Miller, a staunch Giambrone supporter, stood by him after news of the scandal broke. He said last week he thinks Giambrone has done a "terrific job" as TTC chair and that he should continue working in that capacity.

While he addressed his short-term future, Giambrone wouldn't say if he would seek re-election to council in this October's municipal election.

"I haven't filed any papers yet," he said. "There's lots of time to do that. I think I have until Sept. 10. I'm going to figure that out over the next couple of months, and then I'll be able to make a formal decision."

Giambrone had kept a low profile since his withdrawal from the mayoral race, and reportedly left Canada to go on a short vacation with McQuarrie.

He returned to work at his office on Tuesday.