Pet Sitter Needed - Full-time / Part-time

I'm looking for a great walker for 2 dogs. You should be active and able to walk my dogs. They are retired racing greyhounds and weigh about 80 pounds each. They can get very excited when they see other dogs so need to be kept far from them. They are very sweet; one is 8 and one is 10. They will often stop and lay in the shade if they get too hot so walking earlier in the day would be best.