Do non-US MDs do anything like board certification?

[penta]

So. For a story I'm writing, one of the primary characters is an MD from Israel.

Problem: I'm trying to figure out how old the character should be, and running into the problem that I have no idea how long post-med-school training takes (I know med school is 6 years at most Israeli universities (except when its 4, what the heck?) and starts with 3 years of undergrad coursework, thanks to some googling, though) or even if it is a thing outside of the US.

To illustrate what I mean, a US MD would (to my knowledge) do:

4 years undergrad (lets figure 18-22)
4 years med school (22-26)
residency in whatever specialty for a few years (3-5?) (27-30?)
fellowship leading to board certification. (I have no idea.)

And then the number of potential paths branches off into infinity so I don't track that when trying to age a character.

I don't have the faintest clue though what "medical education after med school" looks like for docs outside the US or if it's even a thing that exists. Double the confusion with Israel given the presence of conscription and stuff.

What I googled: ""medical education" Israel" ""medical residency" Israel" ""medical specialties" Israel" and similar searches with Europe in place of Israel.

military police/security?

[mythochromos]

I'm prepping for a TTRPG campaign in which one of the NPCs is either military or retired military, and working as a head of security for a site belonging to a secret government agency. Think Delta Green or The Laundry Files. What would be a reasonable minimum age for a person in such a position and what rank would be reasonable for him to hold? Is there anything important that should be in his career history? I'm pretty flexible about details at this point, just want to make sure I get the essentials.

ETA: Just realized I should put some more details on this! It's going to take place in the United States and I was planning for him to be Army because it takes place on the unwatched back corner of an Army base (Camp Grayling), but if he's retired from the military he could have been in any branch.