Writing a cover letter for a previous employer requires highlighting your existing knowledge, valuable skills, and showcasing how you've grown since leaving. We'll tell you why you might be asked to reapply for your current job and how you can succeed.Plus we've provided some sample cover letters to use. Begin each paragraph with a clear topic sentence and include specific examples of what you have done or achieved from your resume as proof. Our career change cover letter examples and free cover letter builder will help you craft a memorable job application. Example: "Hello, I'm a former employer of ABC and I'm very interested in the job of production manager that you have advertised. The document is a sample cover letter for returning to a previous employer. This letter is especially helpful if you're applying to a traditionally unrelated industry from your previous job. It does the following:. State which position you are applying for, and how you found out about it.