I have worn mine pointed up, under shorts with untucked shirt. Drove in car, walked in mall, drove home. Penimaster also sells an adjustable shoulder strap.
My preference is to wear my PMP at the computer.
You need to experiment, to see if you have any issues, that need addressing, before planning to wear this at work. Penimaster recommends removal after so many hours to check/adjust/look at/massage for circulation/urinate, etc.
Because the comfort level is really great, the temptation to wear it for really long periods of time is there. Best to not over-do any pe device.
Suspicion is in the mind of the beholder, the way one dresses & moves are what feeds the mind of another. Keep your safe wearing of the extender at the top of the list, trying to control what another thinks, may be met with futility.