On Monday we had a subcontractor scheduled to start work on our program. After she did not show up, my manager attempted to call but could not get a hold of her. A few hours later my manager eventually was able to find out that she had passed away that Saturday. This was completely unexpected and was so sudden that not even the subcontractor's company had all the details, which is why we had not been informed.
So my team is finding the whole situation rather surreal. You normally have a relationship with your coworkers and so if one dies you know to grieve. However, since she had not started yet there was no chance for such a relationship to have formed.
Since I had no relationship with this individual I can easily move on and can easily put this all behind me, but I want to make sure I handle this in a professional way. The question I have: Is there a proper or professional way to express ones condolences for an employee that has died, but you have never met?