trainee
US /ˌtreɪˈniː/
UK /ˌtreɪˈniː/

1.
aprendiz, becario
a person undergoing training for a particular job or profession
:
•
The new trainee is learning quickly.
El nuevo aprendiz está aprendiendo rápidamente.
•
She started her career as a management trainee.
Ella comenzó su carrera como aprendiz de gerencia.