Animal Care Needed - Full-time / Part-time

We need a walker to take care of 1 dog in Charlotte. Responsibilities include regular walking. Non-smoker. He needs a short walk in the morning and evening since my Mom's mobility is becoming a challenge. Typically, as soon as he does his business he wants to come back in. We are looking for some long term, 7 days a week, twice a day, 365 days per year. We are looking for a long term agreement... potentially a few years. Please have a backup plan if you cannot make a given day due to illness or vacation.