Why am I here!

I just started a job a few months ago. My direct support setup a thin client environment, which runs itself. This is a startup facility that has quite a bit of opportunities to setup procedures and policies. I am in a telecom/Data environment and backup the telecom person.
My question is, how do I educate the Operations Mgr about what I do? She knows nothing about data/networks nor does she care to know. But I am feeling as if I need to validate my existence