What level of 3d Modeling skills do I need for an Internship

I’m a semi recent product design graduate, who has been working in the architectural lighting design field. I’m looking to move back into product design, however I haven’t had to use 3d modeling programs much since I graduated. I know how to use the programs but am by no means a wiz at them anymore. Its hard to gain access to these programs outside of school. I know all the fundamentals but have never used them professionally, just for student work. I’m applying for internships and I’m wondering how much of a problem this will be?
Any advice on the subject would be great.

Well, do you have any example work that shows off what you know? I would think that as long as you know as much as a 3rd year design student (so about 1 or 2 years 3D experience), you’d be good.