I believe it is "Reporter". Hope that helps:)
A Philosopher
A secretary
A journalist.
The person who writes on behalf of some one else is called a biographer.
It depends a little on what they are writing. In general they are "writers". If they write books they are usually called "authors", if they write poems they are usually referred to as "poets", if they write newspaper colums they are "journalists" etc.
A person who writes commentaries is typically called a commentator or a critic. They provide analysis, interpretation, and opinions on various subjects such as literature, art, or current events.
The person who makes a will (or 'testament') is a testator.
A Philosopher
A person who writes the libretto for an opera is simply referred to as the librettist.
A drawer.
proposal
publisher
A poetry
A person who writes verses is a poet.
A columnist...?
The word is referee.
Procedural Author