I'm not really a professional rabbit person, as I only have one rabbit, but I can try and help. My rabbit has never bitten me, but he lunges at me and puts his ears back like he's going to bite. I think it is because he isn't neutered (he's getting neutered next week), so if your rabbit isn't neutered that would be a good thing to do. He has bitten my friends and my parents because they don't know how to be with him. He only does this stuff in his hutch part, not when he is running in his shed/play house (the hutch is inside the play house).
This is what I do to prevent him from biting me: I don't put my hand in front of him when he's in his hutch. When I want to take him inside or out into his run, I put my right hand over his ears/head/eyes and then scoop him up under his tummy with my other hand. If you do the first step right unless he is really persistent, in which case you have to be a little more firm with your grip, then I think he won't be able to bite. If I have time I could try and get some pictures explaining what I mean since it looks confusing. Let me know if this helps.