Pumping at work can work, but it can be hard. Here are some pointers:
1. Start off pumping frequently if you are hoping not to have to supplement. As the machines aren't near as effective as the baby at expressing the milk, your milk supply can drop dramatically in the first week of work, especially if you're going back before 12 weeks. Try to start by pumping at least 3-4 times during the work day. If you're getting enough to feed baby with the next day, keep it up for a few weeks, then see if you can cut it down.
2. Get one of the delux double electric pumps. It's well worth it if you're using it every day. You can buy or rent them from the hospital, or most lactation consultants.
3. Try to have a quiet, comfortable place you can really relax. Bring one of the baby's gowns and a picture of him/her to help with the let-down reflex.
4. Even if you find pumping isn't working for you, you can supplement during the day, and still have a breastfeeding relationship in the mornings and evenings.
Cesarean babies sometimes need extra help clearing their airway, as they don't get the chest-squeeze from the birth canal, and breastfeeding is an excellent way to help this. You can nurse as soon as you feel like it, even if you've had general anesthesia.
You'll probably find that at first the football hold is the easiest on your scar. Use lots of pillows!