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

1.
Kollege, Mitarbeiter
a person with whom one works, typically in a professional or office setting
:
•
My co-worker helped me finish the report on time.
Mein Kollege half mir, den Bericht pünktlich fertigzustellen.
•
She enjoys collaborating with her co-workers on projects.
Sie arbeitet gerne mit ihren Kollegen an Projekten zusammen.