Bungie has five job offers currently listed; 3D Environment Artist, Game Producer, Lead Animator, Character Animator, and Mission Designer. The requirements and responsibilities can be seen at the Bungie Jobs page. Interestingly enough, though, Louis Wu spotted a sixth position, this one for a Studio Manager - not listed at Bungie.com, but at Gamasutra.

(You'll need a Gamasutra account to view the listing; if you can't be bothered to register for one, feel free to use this info:
Email: vector40@aol.com
Passord: 693819 )