I'm currently doing my final-year internship in a relatively big company which has a dress code. My engineering school tutor is required to come once to my workplace, and this is probably going to happen during the next month. He is very untidy and lacks communication skills. I feel that if he shows up in his normal manner, it's going to reflect badly on me and hurt my chances of being hired after my internship.

You might ask, "Why did you choose him as his tutor?". Generally, our school assigns tutors without consulting with the students. 

What might be a reasonable solution to this potential disaster?