Pisces' number one career priority...
Perhaps more than any other sign, Pisces can be sensitive to the pool in which you swim. Your surroundings affect you deeply, as do those subtle vibrations you pick up from people and objects.
If your cubicle is too cramped, the lighting too harsh, or the music too loud from the next guy over, you won't be happy at work. Most employers are flexible when it comes to keeping good talent, and you are a gem worth keeping.
If telecommuting would make you happier and more productive, lay out the benefits of such an arrangement for your boss. Everybody wins!