Security News > 2020 > August > The NSA on the Risks of Exposing Location Data
Thus how do you get meetings when you need them, well using "Lunchtime" as an excuse to go into "Meeting mode" is acceptable to most, but a trend in more recent times has been to put a meeting with yourself in your calander etc so you can get undisturbed time for concentration etc.
Always make a note of your purchases in your diary often but not always putting the recipts in as well till the end of the week etc when you more formally write up expenditure as personal finances / expenses then sling most but not all personal recipts "In a shoe box".
As a rule contractors are told nothing other than relates to a specific technical task that has to be carried out at a location they might not even be aware of.
Contractors are also frequently "Day trippers" or "Out of towners" that is they are not local by a long way to the location they are to work in, whilst they may meet an agent or a NOC operative they rarely get to see those who have Official Cover, this is so that "Arms Length Managment with Official Deniability"(ALMOD) can be maintained.
Which leaves the more interesting "Baboons" climbing the IC agency tree, those with Official Cover and those who would normally be under Official Cover but are infact "Illegals" Not under Official Cover.
News URL
https://www.schneier.com/blog/archives/2020/08/the_nsa_on_the_.html