Here’s how to apply for MTI duty Published Dec. 16, 2008 Keesler Public Affairs KEESLER AIR FORCE BASE, MISS. -- The Military Training Instructor recruiting team conducted their regularly scheduled visit here Wednesday. Air Force members who may have missed the team's visit do not have to wait for the next visit to apply for MTI duty. More than 250 slots are currently open for MTIs. Airmen 1st Class with at least 24 months time in service through technical sergeants with less than 16 years total active federal military service are eligible to apply. Master Sergeants are hired on a case-by-case basis. Enlisted personnel from all Air Force specialty codes that meet the previously identified criteria can apply. For more information about becoming an MTI, visit the Air Force Portal under "Lackland AFB--37 TRW" or call DSN 473-1016/1018.