Wiktionary
job of work
n. A required job or task; a job that requires a substantial amount of effort.
Usage examples of "job of work".
Hadn't he been the very one to teach her there was always more than one way to approach a job of work?
And there was no problem of finding a well-appointed house to live in or a job of work to do, for the excess population of the nation was more than willing to expand beyond the British Isles.
My boy Jaem, the one who carried the scale for me, his first paid job of work was mucking out in a stable.