Questions & Answers about Mi madre es secretaria.
Why is there no word for "a" before secretaria?
Would it be secretario if my father was a secretary?
Yes. Job titles in Spanish change to match the gender of the person holding them. Since a mother is female, we use the feminine form secretaria. For a male, you would use the masculine form secretario.
Why does the sentence use es instead of está? Isn't a job a temporary thing?
Even though someone might change their career, Spanish treats a profession as a core part of a person's identity. Because of this, you always use the verb ser (which becomes es here) rather than estar to talk about what someone does for a living.