In German class recently we covered how to talk about what you do for a living. There’s an expression that means, roughly, by profession – “von Beruf.”
We went round the room asking each other “Was machst du von Beruf?” – “What’s your profession?”
The term “von Beruf” implies a sort of education and authority underlying your occupation. Your “Beruf” is the thing you studied in university or the skill you trained for in the technical college. In addition to your profession, you have your day job, the real thing you do to get your money.