Why do I need to renew my international passport if it expires after?
Like FAR TOO MANY PEOPLE on Quora, you haven't said what country's passport - or visa for that matter - you're talking about. However, your graduation (you didn't bother to say from what) is irrelevant. Maybe the country to which you are applying doesn't want to waste time time processing visas for someone who isn't even going to be able to travel in the near future. Maybe your passport number is attached to the visa, or the work visa goes in the passport. Why not just renew your passport?