[SFConservative]

Not all TS/SCI involves poly. If you fail the poly, you just can’t work poly gigs.

Simply not true. Having the TS/SCI clearance requires periodic polys. If you fail and fail the retake you are debriefed. There are additional polys required for some specific compartmented projects.

[Brown Deer]

Having the TS/SCI clearance requires periodic polys.

Nonsense. I've never taken a polygraph test in my entire life!

[fruser1]

Nope, there are gigs that don’t require poly with TS/SCI and I know several people in that regard. Living around DC I know folks w/every clearance under the sun and have had a few myself.