co-worker
US /ˌkoʊˈwɜːr.kər/
UK /ˌkoʊˈwɜːr.kər/

1.
collega, medewerker
a person with whom one works, typically in a professional or office setting
:
•
My co-worker helped me finish the report on time.
Mijn collega hielp me het rapport op tijd af te maken.
•
She enjoys collaborating with her co-workers on projects.
Ze werkt graag samen met haar collega's aan projecten.