Don’t you need a real estate licence in the US? In Australia, you need a licence to sell real estate and builders definitely need to be licenced.
Someone working in an office doing general paperwork wouldn’t need a licence (other than a driving licence) in most fields but there are some where you’d expect they would be. Social workers, nurses, lawyers, accountants come to mind).
General sales people would quite possibly only need a driving licence. Those working in the building industry may be expected to be registered as a builder though (by their employer, not by the government).