Thanks for the feedback. Not for myself. It’s just some recon for my son.
I guess what I'm saying is there's HUMINT (Human Intelligence), SIGNIT (Signals Intelligence) , and other kinds - and if one like working alone then often one will prefer other than HUMINT jobs.
For enlisted men - even in the Army - there's human intelligence gathering - you do whatever to get things on this human - who is difficult to gather on as he alters his behavior a bit from day to day.
I did once have a gentleman I needed to know his habits better than HE knew his habits, as the purpose of the task was to be able to predict where he would go, and when he'd be there at a certain day. What made it difficult was he KNEW he would likely be followed, monitored, and otherwise observed - and he went to great lengths to intentionally change up his routine.
I studied every move, every day, times, locations - his backtracking this trail, circling back, just holding up in areas of no traffic to see if he was being followed. When I say I studied - I pored over every move, looking for a pattern.
Finally, one day I was hoping for a chance to ambush the following morning before sunrise - and I found his "tell." I can't even remember what it was not - but it was some kind of thrill figuring him out - and able to know where he would be before he'd made up HIS mind.
And bagged him.
Everyone has patterns. Same friends, same hangouts, same times of the day, same routes - and even when one tries to confuse the matter and preclude being anticipated - your backtracks, circling around, pullovers, and stunts - they themselves become a pattern.
That means lots of groundwork, field recon, observation point locations - and it's a real hoot when you bag your target.
For you - not for him!
Your son should take his time and figure out if he's more of a detail detective in more isolation - or does he like to help out-calculate an opponent which requires more interaction with others.