The world is in a terrible state with whole districts falling into disrepair as we see when Ant-Man is walking down Cassie's street. As such it needs rebuilding and repairing so there would be countless jobs on offer to sort that out.
And to be honest in the grand scheme of things will these people even care, at least initially? They were dead and now they are not, reunions are to be had and the world rebuilt. People aren't going to care initially whether or not they have a job, they would just be glad to be back once they find out what happened.
or would Professor Hulk's snap have also restored the jobs these people had before the Snap by Thanos?
No, the snap by Professor Hulk only brings back the dusted and changes nothing else, or at least that is what he tried to do. Tony makes it very clear that all they were doing was bringing people back and Professor Hulk agrees with him.
This is made clear with what we see happening with nothing else in the world changing, the bird coming back and Peter's comments along the lines of "I fell asleep and when I woke up you'd gone" (not correct but the sentiment is the same).
In fact the Russo brothers actually answered a related questionin an interview from this Chinese source. As the original article is in Chinese I am getting the quotes from this reddit post, although I think all that's happened is that the user ran it through Google Translate.
Q: What about those people who got dusted? What did those five years mean to them? Why didn't they grow older when undusted?
A: Yes, those people whom was lucky to survive the snap are 5 years older than the people who just got back. The reason Spider Man saw his friend again in high school at the end was simply because his friends was unfortunately also dusted like Spider Man was. Of course, there are people in his grade whom didn't die and they are probably already in colleges by now. To those dusted people, they had no conscious in these past 5 years. They didn't know what happened. It's as if they had just woke up from a long sleep. The only one who was aware about how many years has passed was Doctor Strange, because he has already seen that when he was time mediating on Titan. Parker's reunion with Ned was a touching moment. There are also people whom indeed moved on but suddenly was reunited with their lost ones. Yeah it's kind a complicated world now.