Question? I am not sure what you are asking, but it sounds like sacroiliac joint pain.
Try stretching, etc. If your job requires sitting all day, it might help to stretch, and move your body in the opposite way that you move it when sitting down to work. This would not only be likely to help the buttocks, but also your lower back, a true example of a place where chronic pain occurs. Lying on your stomach, and/or some swimming may also help.