I am just about to finish an under graduate work placement that I have been on for the last few months. During my time I have been working on a project with someone as a supervisor (he was not my line manager though) who is quite high up. It is a large company (about 1,500 employees) so this is quite significant.
Anyway to cut the story short, I finished the project and in an email he wrote that I had done an excellent job and I should stay in contact with him after I leave. I have one more year of college before I receive my bachelors degree and I would love to get a graduate job at the same company. Therefore I need to keep up conversation albeit not regularly but enough during the year so I'm not forgotten.
I cant really say 'Hey whats up? Hows it going? Did you watch the match?' etc.. What do I say that is professional?
Edit: I think it is important to note that I did not have anything else in common with him while I was on work placement other than this one project. He was just a supervisor to me for the project. Like I said he was in a completely different department.