Word-of-mouth leads in Birmingham (Birmingham)

A friend who works at a local manufacturer says there are openings not advertised online. Any experience at all would help. One is a print shop, one is an accounting firm and one is a clinic. What do you write in a cold email?

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

Keep a list of who you contacted and when. It makes follow-ups easy.