When referring to people that have joined a company, would the term new-joiners be hyphenated or not?
My understanding is that the word is a compound noun where "new" is the adjective and "joiners" is the noun, forming a single word meaning it should be hyphenated.
We’ve been working on a project to help welcome new joiners.
You wouldn't refer to someone as an old joiner, or just a joiner.
"new-joiner" or "new joiner"