This guy sounds very talented, except perhaps at finding a job. He describes lots of interesting things he can do, without really describing what benefits he can offer to a potential employer.

Most of all he does not really describe what he would like to do (there is an undertone of teaching mathematics, most of which I would assume is done at university's and most of their recruitment would probably not be done through this way).

Providing a portfolio of a variety of skills without really defining what you want to do is really going to limit your employment potential to a select few.