Hi Steve !!
Read through your post .. Well I want you to check few things ,
1) What kind of chair do u use at your work place , does it support your spine completely or only supports your upper back ??
2) Do you frequently take breaks while working or sit on the chair foe hours together ??
3) Does your pain get agraveted on activity ?? or is it present constlantly throughout the day ??
4) Does the weather has any effect on the pain ( winter increases the pain and in summer its less ?)??
If you are able to reply to my quests , i think i would be able to give u a perfect set of exercises and help you better ..
Regards,
Radhika