Could you tell me how exactly did you land (and what it is) your current job, and from what previous possition did you come from?

Currently a Data Scientist for an MBB consulting firm. Came from a quant role (as a Project Manager) from an Ibank. Everything I do in my current role is pretty much straight from ISLR.

Can you specify which book you mean, when you say "ISLR"?

Thanks!

This one: http://www-bcf.usc.edu/~gareth/ISL/

Not to be confused with this one: https://web.stanford.edu/~hastie/ElemStatLearn/ (a.k.a. ESL)

Do you happen to know how the two books compare to each other?

Elements is much more rigorous and also longer.