Hey there! I totally get wanting to keep your hair transplant under wraps at work. When I had mine done, I wore a hat for the first few weeks to avoid drawing attention. Then, as my hair started to grow in, I styled it in a way that covered the transplant area.
I found that most people didn't even notice until I decided to share my experience with a few close coworkers. Just be prepared for some questions if you do decide to open up about it. Overall, the process was definitely worth it for me, even if it meant a bit of extra effort in the beginning to hide it. Good luck!