Doer (noun)

A person who takes action and gets things done.

Origin:

Late middle english: from old english dōra, from dōn "to do".

Examples:

1. He was a doer and not just a talker.
2. She was a doer who always got things done.
3. The company needed more doers and less talkers.
4. He was a doer who made things happen.
5. She was a doer who took the initiative.