Reserves seems to take in older applicants than the Guard does. Guard seems to be hiring for slots in future fiscal years whereas the Reserves are continuously hiring. For the reserves, you need to find your region Officer Accessions Recruiter (not the same thing as a normal recruiter) they will guide you through the application process and attempt to find a unit to sponsor you (interview). However, you can meet the AFRC pilot selection board unsponsored and they will place you in a unit based on manning requirements after your graduate UPT. 27 is definitely not to old for my unit, as long as you will be in your last semester of your 4 year degree in time to meet the AFRC board and make UPT by your 30th birthday. Like others mentioned, these units aren't going to seek you out, you have a lot of legwork to do and need start after you close your web browser.