Hmmm... I can think of several concepts, but I'm not sure where to start. Where will the image be used? WIll it be in print, on the web, printed on T-shirts, that sort of thing? Would it be better to be large and full of detail, or would something uncluttered and simple be more appropriate? Would it be better to be very colorful, subdued, or black and white?

One idea off the top of my head would be to show a woman in plain clothing by herself looking in a mirror, and seeing her reflection in uniform or other working clothes,  and the woman in the reflection might be surrounded by other women dressed for other pursuits.