Harry isn't sure 18th century naval combat is a transferable skill to Starfleet security. But it seems like a more likely job than, say, engineering, and he recognizes a need to be useful in Laurence from himself, and from his fellow students at the academy.
"I'll ask Lieutenant Tuvok to talk with you, then. He's chief of security."
He realizes the tour is pretty much over.
"If there's nothing else you need, I should probably get back to my duties. But, uh, I'm going to be getting lunch in the mess with a friend of mine at 1300 hours, if you want to join us."