It seems to say these students were either employed in grad school or enrolled in grad school within 6 months of graduation.
But that’s not what’s intended.
We need a couple commas: “95% of students were employed, or enrolled in graduate school, within 6 months of graduation.”
(I’m uneasy about within, too — because it can mean either before or after. Or can it mean both? Some were hired or enrolled 6 months before graduation? Maybe. We can’t tell for sure. I want to know for sure. Good writing lets you know for sure.)
Commas are underrated. I think you should be able to get an English major with a minor in Commas.
I volunteer to teach the Commas classes.