Career Fields Categories related to different Air Force career fields. 13B Air Battle Manager 13S Assignments 13S Space Operations 13S Tech School 18A RPA 21A Aircraft Maintenance 21R Logistics Readiness 31P Security Forces Choosing a Career Field Share this:Click to share on Facebook (Opens in new window)Click to share on Reddit (Opens in new window)Click to share on LinkedIn (Opens in new window)Click to share on Pinterest (Opens in new window)Click to share on Twitter (Opens in new window)Like this:Like Loading...