I once worked in a SCIF and (with one exception in the morning where a security officer could just check your ID card to speed it along) even if there was a large group of people entering every single one needed to close the security door behind them and let the next person use their key. If someone, especially someone you don't recognize, asked you to hold the door you were supposed to say "no" and inform a security officer.

[–] DaCookeyMonsta@lemmy.world 2 points 11 months ago

That's comforting.

I used to work in a testing lab that housed a lot of prototypes for other companies so we did the same, didn't recognize someone we closed the door behind us as we went it.

Fun getting yelled at by strangers for not holding the door, bit at least security was right next to the door to ask who they were.