New applicants can apply online to be a substitute teacher or substitute instructional assistant through the FCPS Instructional Talent Gateway. She got handed a one page letter stating she is being offered a job as a teacher contingent upon meeting some conditions such as passing background check.Step 1: Search for Instructional Positions Step 2: Confirm Qualifications in Area(s) of Interest Step 3: Apply Online Fairfax County operates under a merit system, which means that applicants are selected for jobs on the basis of their education, experience and skills. Prepare an application: FCPS requires applicants to complete an online application or paper application. 2. After a background check, the individual will receive an offer letter, and the hiring process will be complete. Please include your name and recruitment number on any documentation to ensure timely processing. If USCIS approves your Form N400, Application for Naturalization, we will schedule you to take the Oath of Allegiance at a naturalization ceremony.