Word-of-mouth leads in Tulsa - any advice?

A friend who works at a local manufacturer says there are openings not advertised online. I am in Tulsa, in case local advice matters. One is a print shop, one is an accounting firm and one is a clinic.

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

Small employers often hire on recommendation. Ask neighbours, former co-workers and your library.