I never post here, but I have a library/archives background myself and ended up working in the tech industry. I would consider widening your criteria to include customer support and quality assurance for tech companies. Both of these involve skills that you surely have as a librarian - customer service, organization, ability to understand systems, attention to detail.
My route was through customer support. From there I was able to get into product management and eventually triple my librarian salary.
I don't know if there are any companies that fit this bill in Denver, but I would also suggest starting with tech companies affiliated with the library industry. Publishers, database companies, etc. Not exactly growing sectors but there are still a lot of really good jobs, and could help to transition to any tech company.
One thing I will say about QA - those types of roles are getting more and more technical. But, getting into a company that is moving from manual to automated QA could be an opportunity to get paid to learn valuable skills.
There may be other tech jobs that make sense too - designer, for instance. I know a lot of librarians have this idea of "Today I decided I am going to be X... now I must get the credential for X and only accept X as a job." Jobs for newer tech companies are a lot more fluid. If you are a smart person you can get in and adapt to the job. You just have to figure out how to market your skillset for a given job.
Hope this is helpful