I've been in CO for about 10yrs now. Started here in the military, where due to my clearance, was UA'ed about every 1-2 months. After getting out and having worked for several major employers in the Denver area, I have never been UA'ed. From what I've observed the only employers who test are federal contractors & employers who don't require a high level of responsibility from their employees. Now I have heard from some of my friends, they were UA'ed as part of their initial employment interviewing, but once hired - have never been tested again.

My advice - stay clean until you have been hired somewhere. While interviewing at various places, ask here or somewhere if people know that particular companies policy. Much easier than trying to give a blanket statement for all of CO.