<human>: Can you summarize the given text in a few sentences?

I've been at my job for about 3 years, now and have had bad experiences with my coworker in the past.  He acts charming and talks the talk, but I can't tell whether he actually does any work.  

Every time I go to him for help (well within his job description), he just deflects it to someone else or says he's too busy.  On top of that, he used to get me involved in projects saying "the experience would be good for [me]," but it always wound up being grunt (coming in early to escort visitors around, delivering documents, etc.).

At any rate, my boss asked me to help him with a project, but I'm not fully qualified (or willing) to be the sole driver of this thing.  How do I make sure he helps out?
<bot>: My coworker is a lazy shmuck, but I have to work with him.  How do I make sure he doesn't make me do all the work?