Son Goku
Great Sage Equalling Heaven
I got mine through an FFRDC (gov sponsored think tank).
It helped that I had a Secret clearance from the Navy, but it had expired (they're good for 5 years)
so the FFRDC sponsored my TS-SCI
The Navy clearance was a piece of cake, interview was about 15 min running through a checklist (no I don't have any convictions, no I don't use drugs, etc etc)
but TS-SCI? that shyt took over a year and they went through my whole life with a microscope
interviewed former work managers, college professors, references, neighbors...the whole enchilada
My advice is don't lie or cover up or try to write around shyt. They will find whatever you're trying to hide and you'll be denied (unless you're Jared Kushner)
Like "no I never smoked weed" then they interview your plug from high school
Instead, write "I experimented with cannabis as a youth" and you'll be fine
10 years over here bro.