A way of expressing the first law of thermodynamics is that any change in the internal energy (âE) of a system is given by the sum of the heat (q) that flows across its boundaries and the work (w) done on the system by the surroundings:
Titles don't really mean much. Design Engineer or Associate Engineer mean something only in the confines of the company in which they are used. If you want a definition of different levels of engineers, use the definitions given by ASCE or one of the other professional societies.
Job title: Descriptive designation or title you are addressed by (Who you are) Job function: descriptive text that indicates What you do. Corporate Job titles used to mean a lot (e.g 'Vice President of Manufacturing at ABC Widget Co.' meant you were the top guy in the manufacturing department at ABC.