Certain local infrastructure jobs will always exist. These are the basic jobs that exist in every country on Earth: Food workers (farmers, waiters, cooks), medical people, and personal assistants (beauty salons, clerks, holy priests, etc).
When a country exports a product or service that other countries want, such as cars or silicon chips, that country gains a robust economy and that industry thrives.
When a country ceases to export the desirable product/service, or is out-competed, then the industry weakens and jobs are lost. The U.S. built its robust economy on innovations in many industries. Now many of those industries have waned, and the computer industry is what's propping us up. The other tent poles have collapsed or weakened.
The only thing that can revitalize our economy (and job market) is more innovation from within. We need to export superior products and services, and/or create new industries.