If you look on Wikipedia, you can find some theoretical concepts about what is an engineer, what is engineering and what financial engineering means.
A cook, might be a food engineer in kitchen, a carpenter might be a wood engineer and a driver might be an engineer who operates an engine.
Those things read above might be abusive or not. A lecturer said that an engineer without a thought is not an engineer, but is an operator of something. Interesting.
Read the original article.