Cover letters introduce your experience, skills and qualifications to the hiring manager. 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. Lay out a specific goal you met in your previous employment experience. • Tell how you made a difference for your past company. The document is a sample cover letter for returning to a previous employer. Using the resources below will give you ideas and formats to build your cover letter. I am writing to apply for a Juvenile Probation officer position in your office. My internship with your office in the summer of 2004 prompts my interest. Thank you for your time and for your consideration of my resume.