Location environmental portraits can be a challenge. First of all finding a location that we can make appealing is the hardest thing. Almost always shooting at your desk is not a good idea. We often stage something in another area of the office so that we can get a unique look of an office setting without all the clutter of an office.
An important first step is to schedule a meeting with your photographer so that you can discuss the needs and the look and feel of what you are trying to accomplish.
Next you will want to scout the location, look around the office, with your photographer, and see what possibilities you have. If your office is not suitable for the portraits, then you might look elsewhere. Maybe in the lobby or a local club office or somewhere that will work for your needs. Your photographer will have some experience with this and can help you make these decisions.