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. Online Application Guide. Need help completing the application form? To speed up the onboarding process and prepare you for your first day, we have provided many of the forms you need to complete. Many can be filled out online. New applicants can apply online to be a substitute teacher or substitute instructional assistant through the FCPS Instructional Talent Gateway. Step 1: Search for Instructional Positions Step 2: Confirm Qualifications in Area(s) of Interest Step 3: Apply Online