How To Write A Job Internship Letter . Write about what makes you unique (people hire people) give concrete examples of what you have done and why it is relevant for. State the role you are applying for. 7 Steps to Write Letter for Internship Request that Works Career Cliff from www.careercliff.com Here is a sample application letter. Show off your relevant skills and add info on coursework. The letter should be short and crisp but should contain all the necessary information.