Coworker (noun)

1. A person who works with another person or group of people, typically in the same organization or workplace.
2. A colleague working in the same organization or company.

Origin:

Co- + worker.

Examples:

1. She had a good relationship with her coworkers.
2. The coworker was helpful in training her for the new job.
3. She had a friendly conversation with her coworker during lunch break.
4. The coworker was a valuable member of the team.
5. She asked her coworker for help with a project.