Afternoon/evening And Over Night Sitter Needed

We are looking for a trustworthy and experienced sitter to care for our three children after school and on occasional evenings + overnights when my husband and I are traveling for work. We are looking for someone to begin as soon as possible, but are flexible with timing. We are open to daily, consistent care on week days from 2 p.m. - 5:30/6 p.m. or on an as needed basis, for overnights when work travel is needed (typical need is 5 p.m. - 7:30 AM). Some cooking and housekeeping is required. Someone who can help out with homework is a plus. We have no pets.