Finisher (noun)

1. A person who completes a task, race, or competition.
2. A person who is able to finish a task or project in a timely and efficient manner.

Origin:

From the verb "finish" which comes from old english finiscian ("to bring to an end, finish, complete.")

Examples:

1. The finisher of the marathon received a medal and a certificate.
2. The construction company had a team of finishers who worked on the final stages of the project.
3. She was a natural finisher and always met her deadlines.
4. The finisher was the last person to cross the finish line.
5. The finisher was able to bring the project to completion on time.