Jobs at small St. Louis companies nobody posts about - first time posting

A friend who works at a local manufacturer says there are openings not advertised online. I would rather hear the honest version than the polite one. One is a print shop, one is an accounting firm and one is a clinic. Does anyone have similar leads?

Keep everything in writing and save the confirmation numbers. It made the follow-up calls so much easier.

Visiting in person worked for a trades job. For office jobs, email was better.