No problem, as a fellow sufferer and long time computer user, I know how bad ergonomics can make posture issues worse and give you more chance of repetitive stress injuries. Your folks in charge would be wise to give you a more ergonomic situation, as better ergonomics result in higher productivity and lower workers comp claims. Getting off my soapbox now
If it's around the rotator cuff, you might try strengthening that area with Jobes exercises. You can search YouTube for some good videos. This one looked pretty good
http://www.youtube.com/watch?v=tjA0YNAQI7U
Good luck!