Hi,
Just wanted to make sure you are completing the correct form: http://www.cic.gc.ca/english/information/applications/extend-worker.asp
Because she is applying as part of a sponsorship, she does not need a job offer. If she was applying for an "intra-company transfer" visa (as, it seems, she could) it would be a different process altogether. But since you are sponsoring her, she doesn't need to do that.
All you need is the application linked above and the fee, far as I know.