Its a day everyone dreads, portrait day like in school! Once I was done, they couldn't wait for me to return to take more! I did two looks, one classic studio and the other a bit more current or cutting edge. They chose both! For different purposes and each person now owns a two perfect retouched portraits to use for social media as well!
The important part of photographing in a corporate environment is being quick and efficient. Give direction on positioning and tell them where to look. It is also beneficial to have a decent sense of humor, especially when the other co workers are observing and teasing!