If I have this correct, there are three things you would like to accomplish:
1. Not pressure her or make her feel you're making advancing at her at this point/ building a friendship
2. Learning more about her job and getting involved with the work if possible
3. Keeping the option of the two of you becoming more than friends some point later down the road.

Problem two would be the easiest to address likely. Tell her that you find her job interesting (which sounds like you already have) and indicate to her that you would really like to be involved in some way or form. Ask her who you should talk to (if she's not the person who hires) about getting a position/volunteering. If there's nothing available, ask her what other places does similiar jobs and check them out. If you honestly express your interest, I don't think she should have a problem with this at all.

Now, the first problem is kinda tricky when considering that problem number three is looming. So, to tackle #1, keep an open communication. That's the key to any successful relationship of any kind. Try spending time with her in group settings like with friends or going to places where there's plenty of people. Avoid being in romantic settings. Keep conversations light and airy mostly, and show her that you enjoy her company. Do the things that friends would do.

Now, number three comes in. Because you don't want want her to think you've lost interest in her and have her see you only as a "friend", this is going to have to be explained to her. Explain that you're interested but you'll like to start as friends first and se if more develops. Tell her that you're not trying to pressure her and that you enjoy spending time with her. I think she'll appreciate and understand your sincerity.

Good luck