Here are some helpful words of encouragement for a coworker, whether you're congratulating someone on a job well done or trying to get the best out of your team:

1. Great work!
2. Your hard work is paying off.
3. The passion you bring to your work is inspiring.
4. You’re a true team player.
5. Thank you for going above and beyond on this project.
6. The way you handled that task was impressive.
7. Your contributions to the team have been really helpful.
8. Your commitment to this project is commendable.