你从事什么行业的 ？

Nǐ cóngshì shénme hángyè de?

What industry do you work in?

他从事教育工作。

Tā cóngshì jiàoyù gōngzuò.

He works in education.

他从事教育工作已经十年了。

tā cóngshì jiàoyù gōngzuò yǐjīng shí nián le.

He has been engaged in educational work for ten years.