The Department of Personnel handles inquiries pertaining to applications or job requirements for the Secretary of State's office. When you apply for jobs, you will be asked to present certain documents like your birth certificate or social security card.We offer career counseling services via email or virtually. Call the Department of Personnel at 217-782-4783 (Springfield) or 312-793-5515 (Chicago) to have an application sent to you. The first step to becoming a Chicago Police Officer is to complete the online application. You must be at least 20 years of age to take the exam.