That picture, to me, is basically just a womanly-bodied woman dressed in absolutely male clothes. The overall picture is androgynous because the person and clothes don't fit, but I don't see how the clothes are anything but purely male. I honestly think your best option is casual-serious clothes, unless really everyone in the office is wearing stern classic business clothes. That will likely offer many more androgynous options to make you feel comfortable, in the women's section particularly.
And really, I don't begin to understand what is wrong with showing your curves. You're hired now. What do you expect? Sorry, sir, you look womanly, so you're fired? Or do you really think your breasts will go unnoticed?
My first girlfriend, prior to transitioning, while on HRT, tried her hardest to hide her breasts with the baggiest XXL t-shirts and still got stares all the time. And not sure she had even reached a B cup at the time, not to mention her body is larger than yours, which should hide things better. I think trying to hide it will only make you look awkward.