Coding for Internship Interests

Hello. We have Raisers Edge and RE NXT - Alumni Module, Event Module and Proposals


Our organization is looking to track internship/career interests for our current alumni so we can direct them and connect them to opportunities as they arise or help them make connections to other donors and volunteers in their desired fields. 


I would like to steer away from using constituent attributes because it is already pretty crowded there in our database, plus they can not be updated through NXT - so far. 


I had thought of adding the career interests under Philanthropic Interests. 


Are there any other suggestions?