Using proper grammar, good sentence structure, and a clean resume format will demonstrate your professionalism and expertise. Interview and Application Tips.A resume should list the most recent, last 10 years or so, of work history. This application will not be considered unless fully completed and signed. Application – To apply for a civil service test, you must first apply to a classified job posting. External candidates should apply on the County's Job Board. The following information is a guide to help you build your resume and highlight your professional experiences (you likely have more than you realize). Job Posting Response Form. Cover letter (with salary expectations), Resume, Copy of this application.. DD-214 or Certificate of Discharge.. College Transcripts.