I wear bras at work regularly. I wear T-shirts and polos, and depending on the size and material, the bras normally don't show that much.

Recently, though, I've found it harder to hide, as I think my breasts are getting bigger, causing more projection when I wear bras, and making the mounds or outline of my bras show through more clearly.

Still, I can't say I've noticed anyone looking or noticing. Well, if they did, they have a good poker face!

Can't say I've worn a bra to work but I have worn a fitted camisole over a corset. Fitted meaning it had cups built in. The cups gave too much projection so I just stuck with ones with a shelf bra. They give you a nice shape and I love the feel of the stretchy fabric.