I can't tell from your post how long you have been at your job. If your relatively new and you liver has not been damaged you may want to wait until you get established with a good reputation.
On the other hand, if you decide to tx, I personally, would not tell anyone at work. But, they need to know something. I say this because, if, you have a hard time (hopefully you won't), your boss and co-workers will definitely know something is wrong. There is a stigma that comes with HCV.