bonjour
I work for a newspaper and I go places to find out what happened
Je travaille dans un journal et je vais dans des endroits pour trouver ce qui s'est passé
je suis le journaliste-reporter
It's an English noun, but that's how it's said in French ...
Chroniqueur is different... something like columnist, chronicle but, however, it might be what you're looking for, for small news, not important ones
envoyé spécial = is when you go in special countries to cover events for a long time...