Animal Care Needed - Full-time / Part-time

We need a sitter to take care of 2 cats in Silver Spring. Please see below for responsibilities, schedule and more. It would involve coming to the house two times per day (morning and early evening) to feed and provide attention/play and also change water in fountain (every 3 days) and remove waste bag (about once per week) and add litter as needed to the Litter Robot (about every few days).