Occasional Dog Walking - Beautiful, fun, well-trained dog

I am looking for a once-in-a-while dog walker for my dog. He is a professionally trained, CA-state licensed service animal and therefore well behaved. He still gets to play like a regular dog when he isn't working, though! He is medium/large sized with no behavioral issues. I am looking for someone responsible and dog-loving to walk him on occasion if I have an atypical day and cannot have him accompany me. This would be an ideal job for someone who loves dogs and is around campus during the day. Frequency and timing is extremely flexible. Pay negotiable; please follow up with a bit of information about yourself and level of experience with dogs/interest in the job. Thank you!