I want to resign due to health reasons

I have been a dedicated worker to a company for many years. I received excellent reviews and outstanding performance. Last summer we were told that our department was going to either dissolve or merge. The company atmosphere got so hostile that I began to experience stress induced asthma attacks. I want to resign due to my health problems with the intention of finding another job with a different company. I am looking for an attorney who can assist me in writing a letter of resignation and support me in getting a some severence and or unemployment benefits. I want an attorney who is experienced in unemployment law and representing the victims of a corporate restructure in which they dealt with emotional distress. I would prefer a lawyer from the Denver area.