Fairfax County operates under a merit system, which means that applicants are selected for jobs on the basis of their education, experience and skills. This guide describes how to apply for jobs using the Career Page web site.The process consists of the following steps: The following information will assist you in applying for jobs with Fairfax County. You may also download this helpful brochure to assist you. After viewing the descriptions and qualifications of the job, click apply to job. New applicants will need to create a login and complete the application. To initiate the application process click the Apply tab. The Apply tab is located toward the top of the posting next to Job Details. New applicants can apply online to be a substitute teacher or substitute instructional assistant through the FCPS Instructional Talent Gateway.