Concealed means concealed.
As long as nobody sees your concealed weapon and nothing happens for you to need to use it, it shouldn't ever be a problem in my book.
The only advice I would have, never tell co-workers, even if you can trust them. And of course NEVER show it to anyone. In some ways it's best if nobody actually knows who is armed, largely for the safety of the armed person. You don't need the target on your back, from both shooters AND your own management.