The following information will assist you in applying for jobs with Fairfax County. You may also download this helpful brochure to assist you.In this article, we share the steps for writing an application letter along with a template and an example for you to use when writing your own. Sample Letter of Credit. Supporting Documents. A method of recruiting for hard-to-fill positions that allows agencies to receive and consider applications without deadline until the position has been filled. Knowing how to write a cover letter for a job can help take your job application to the top of the pile. Here's exactly how to write one. It's best to match your cover letter to the employer and the specific position. A list of cover letter examples in different industries.