Nanny Job in Vancouver, British Columbia

I am looking for a nann for 8-year old twin boys. The nanny would have to pick the children up from school at 3pm (earlier on professional development days, if possible) and supervise them until 5:30. On some days, the nanny would have to take the boys to piano or other activities. The school and all after school activities are walking distance from our home. We are very close to Main Street SkyTrain station and public transit.