Questions & Answers about Él es maestro, pero este año está de mesero.
Why do we use es for the teacher but está de for the waiter?
Why is there no un before maestro? Shouldn't it be es un maestro?
In Spanish, you drop the indefinite article (un or una) after the verb ser when stating an unmodified profession. You only add it back if you include an adjective, for example, es un maestro excelente (he is an excellent teacher).
Could I just say está trabajando como mesero instead of está de mesero?
Is mesero used in all Spanish-speaking countries?