Small employers hiring around Kansas City, hotel front-desk agent here

A friend who works at a local manufacturer says there are openings not advertised online. This is my first time dealing with any of this. They like a brief email with a résumé. What do you write in a cold email?

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

Thanks for writing this out. I went through something close to it 5 months ago, and it got easier once I kept a simple log of every call and form.