What is a enganear?

Answer 1

I believe, you're asking what is an engineer. We are strange people locked in cubicles that are allowed no natural light. In this artificial habitat we are given tasks usually involving tons of numbers and physics. We also build things that benefit a majority of people. In very simple terms though we design/build things usually involving an element of either high technology or some brain churning math/physics/chemistry.

To separate it from scientists, they'll invent a theory, test the theory and make the first really cool thing. The engineers go "We can make it smaller, better, faster". Where scientists come up with space travel, the engineers build the space shuttle. Scientists tend to be tied to Universities where engineers can be found in a lot of private industry.