When we want to talk about a temporary job we use the verb estar (not ser), followed by the preposition de.
Read and listen to these examples:
Yo estoy de recepcionista en un hotel.
I am working as a receptionist in a hotel.
Mario estaba de camarero en un restaurante.
Mario was working as a waiter in a restaurant.
Irene va a estar de secretaria en una oficina.
Irene is going to work as a secretary in an office.
Nosotros estamos de mecánicos en un taller.
We are working as mechanics in a garage.
To say what your "more permanent profession" is see Using ser (not estar) to say what you do for a living.
See also Conjugate estar in El Presente (present tense).
Learn more about these related Spanish grammar topics
Examples and resources
Irene va a estar de secretaria en una oficina.
Irene is going to work as a secretary in an office.
Mario estaba de camarero en un restaurante.
Mario was working as a waiter in a restaurant.
Nosotros estamos de mecánicos en un taller.
We are working as mechanics in a garage.
Yo estoy de recepcionista en un hotel.
I am working as a receptionist in a hotel.
