a cashier

[Virlope]

Hello. My question is. Must I put "a" or "an" before the professions?
For example: I am a cashier/I am cashier. Bye. Thank you very much

 

[panjandrum]

In your example, yes, you need a.
I am a cashier.

 

[Sallyb36]

if the profession begins with a vowel you need an if not you need a
eg.
a doctor
an architect
a cashier
an engineer