This look is one of my favorites!
I l-o-v-e a good chambray shirt. It covers up everything you need, gives you structure, and soft to the touch. With the top leaning more toward the billowy, loose style, I try to pair it with something more shapely to define my body - an essential part of corporate attire. You don't want to be so stiff that you're uncomfortable, but also not so loose that you cross that casual line into slob status.
Again, it's important to note that polished hair and clean makeup is essential to tying the look together.