Jobs at small Milwaukee companies nobody posts about after 8 years as an accountant

Two small Milwaukee employers told me they are hiring but have not posted yet. I worked as an accountant before this. One is a print shop, one is an accounting firm and one is a clinic. What do you write in a cold email?

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

A short email with two sentences about what you can do and your résumé attached worked for me. I followed up after a week.