After my trainig period in the new job (10 weeks), I joined a different department with very expirenced guys, one of them got my mentor, with him I was at my first plant (continues casting platn where next to me where thousands of kg molten steel) where we updated all controllers to a OS. From him I learned all the real life best practice stuff as well as the internal dev tools.
Without him I would not be able to be mentor to my new college now.
And also he became a friend