I am a university academic (Associate Prof), I work in nuclear chemistry. I have two degrees in chemistry (BSc + PhD).

I enjoy using excel to model things, in my youth I used BASIC and Fortran to model things but sadly I no longer have access to a computer on which I can run either BASIC or Fortran.

I have been known to use things like Bateman equations, home brewed Monte Carlo and successive approximation to get the answers to things.