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

1.
rekan kerja, kolega
a person with whom one works, typically in a professional or office setting
:
•
My co-worker helped me finish the report on time.
Rekan kerja saya membantu saya menyelesaikan laporan tepat waktu.
•
She enjoys collaborating with her co-workers on projects.
Dia senang berkolaborasi dengan rekan kerjanya dalam proyek.