Boeing has several facilities in the WA area. The biggest is Everett, wa which houses the 747, 777, 787 and 767 programs. Renton, wa houses the 737. Auburn, wa and Fredrickson, wa are fabrication plants, although some assembly work is done there as well.
In the 4 years I have worked with Boeing I have been on 787, 777 and 737 in several different shops with quite a few different job codes. (positions)