These are the people that the NSA hires. And also some military intelligence units as well, but the NSA is where to start.
Check out the Cicada 3301 sites from here:
https://uncovering-cicada.fandom.com/wiki/Category:LINKS_AND_INFORMATIONS_ON_CICADA_PUZZLES_FROM_2012
And share one or two with him.
Also, get him started on coding. Use this to set up the computer.
https://www.2ndquadrant.com/en/resources/2uda/
You should install the pieces. PostgreSQL is where you will store the publicly available data that you can download from just about every government agency. Then use Orange3 to analyze and chart it. Mathematics is the study of patterns, so it is important that he learns the links between numbers and graphs.
Although Orange3 lets you do lots without coding, you can also add your own computations, and that is where he can dip into coding.
Don't let the scale of that frighten you away. Your kid is a new generation living in a new time. This will be common place when he grows up.