Nanny Needed For My Children - Full-time / Part-time

Looking for a reliable/serious babysitter. I am looking for some mornings and evenings. My work schedule changes every week. Most of the time I only need a couple of hours in the mornings. Sometimes I need evening help from 4p-8:30p. So overall small amount of hours for some days/evenings during the week. My schedule is posted a month in advance!