Nanny Needed For My Children

I am looking for a great babysitter for 3 children (boy 11, girl 9, boy 5) in Grand Rapids. Going through divorce and have part of the time. Hours will start somewhat inconsistent and likely increase/stabilize over the summer. Prefer someone who can also provide some care during the school year. Have a very demanding job and need some help. I would prefer someone who could help out with transportation and light housekeeping. Babysitter must have their own car and be a nonsmoker. CPR certification is preferred. Thank you!