I'm sorry to hear that you've gone unpaid. When a claimant has decided to enforce/foreclose their filed mechanics lien, that means legal action will be required (i.e. enforcing a mechanics lien via lawsuit). In order to do so, very typically, hiring a construction or real estate lawyer to aid in enforcing the lien claim will be necessary. Some claimants might be allowed to represent themselves in a foreclosure action (specifically, when they're a sole proprietor), but it's almost always a bad idea for someone to represent themselves in court. This resource should be helpful for gaining a full understanding of what lien enforcement/foreclosure entails: What Is “Enforcing” a Mechanics Lien?. For help finding a Colorado attorney, Avvo and Lawyers.com make it easy to search, find, and compare Colorado attorneys.