A cover letter usually is three paragraphs long and outlines why you are applying for a specific position, a brief overview of your professional background. Explain why you are interested in the position and employer.Include information you have gathered about the organization, and list important facts and details. Choose a sample resume and cover letter according to your program or career interest. These samples are designed to give you an idea of the kind of formatting. This guide describes how to apply for jobs using the Career Page web site. The process consists of the following steps: Your email can make or break your job application. Here we explain the process for writing an effective email for a job application. You can apply for jobs and internships with the City of Philadelphia using the online job board.