Nanny Job in Toronto, Ontario

I work in film & television and work long days (10-12hrs). I have an 11-year-old son and and 8 1/2 year old daughter who are currently enrolled in a daycare (that is a block and a half away from our home) and need to be picked up by 6pm everyday. I'm looking for someone who can start around 5:30pm depending on the work to be done, and work until 8pm most nights. The nature of my work requires me to work later 1-3 nights a week (to 9 or even as late as 11pm), I usually have an idea of what the wk will look like at the beginning of each wk. I have worked with nannies/sitters before and have negotiated a wkly min. salary with additional hours of pay added.