Veterans Preference Documentation (if applicable): Candidates claiming Veterans Preference must submit a DD-214 (Member Copy 4), or, if you are CURRENTLY serving on active duty, a statement of service from your unit which states the date you entered on active duty, the date you are separating, and the campaign medals you have received. Customer Service - experience maintaining relationships with customers, assessing current information technology needs of customers, and developing or identifying information technology products and services that are tailored to meet customer needs.