Reoccurring Babysitter For January / Early February

Hello! My family will be in Boston from January 5 - February 9 for my work. My husband is on paternity leave and will be home with our 6-month-old son. We're looking for someone to come by on Wednesday for a few hours (thinking 12-3, but very flexible) as well as occasional one-off babysitting. Really looking for someone to help him get a break to go to the gym and run errands. Would be a great fit for someone who is looking to add a few hours of work a week in between college classes. We're 2 stops from Northeastern (I'm an alum!). I do have a large Bernese Mountain Dog, so looking for someone who would be comfortable with him in the home as well.