Is it possible to reclassify into an MOS and become qualified without attending AIT?

Last I checked, there was a way to reclass if you have worked in the MTOE position performing the duties of that position for a certain amount of time. I don't know if that is still a thing though.

I do not know if this still holds true, you would need to check with your S1 Personnel Section to confirm and begin the process. Depending upon the MOS you were to reclassify into You could complete the required Army Correspondence Course, upon success full completion the S1 and Unit Commander could submit the forms for reclassification and the new MOS awarded based upon that. That process as mentioned earlier could also be part of a 2 Step process where you would need to attend a Phase II school provided by a Reserve Training Site.

Another option had been to hold Specific and Certified Civilian Skill Sets that are also employed by the Army. Civilian or DoD Firefighters in GS0081 positions with full certifications at or above the vacant pay grade could be awarded the MOS of Firefighter. Similar held True for Heavy Vehicle Operators, tractor trailer drivers. I had been a DoD Civilian Firefighter/EMT and concurrently held a Class A CDL license with endorsements for Doubles, Triples, Tank Vehicles, and Hazardous Materials.

If you are Active Duty, consider options open through the Education Center on you base as well. Your S1 again should be able to assist you if the Ed Center offer courses that are applicable to the MOS you're looking to transfer or cross level into.

Much has changed since I retired from the Reserves in 2001, and a DoD position in 2007. And ask your Platoon Sergeant as well she or he should be able to give guidance.

I don't see it happening- I mean the whole point of AIT is to train you in your MOS to the standards of today- I could see if it was a prior MOS you had held- Have you asked to see if this MOS has an on-line component or is offered as a correspondence course? I took my secondary MOs that way 100 years ago.

You may want to check and see if OJT is still a current viable option. For some MOSs it was acceptable and others it was not. IF it is still an option for the new MOS, you should check it out.

SPC (Join to see) - Well --- in 1978 I was awarded the SMOS of 11B. I was an 11D (today's 19D) but had been assigned to only Infantry Battalions whenever I wasn't assigned to Cavalry.
Did all the stuff and since 2nd Div did the Warrior Walks which everyone tramped through the Korean mountains with all their TO&E fighting gear. Additionally our BC had everyone 'participate' in the EIB. Myself with 4 other Scouts (of a platoon of 29) were successful in the events. Towards the end of my tour, orders for the 5 of us came down with the 11B SMOS orders.
AS for the EIB? Only did it one time as we Scouts generally were out in the field. Of Course we weren't awarded it, because we weren't serving in an 11B MOS. Kudos to the 11Bs out there though - for a bunch of young SGTs and SPCs, it was a tough badge to qualify ;D even if we didn't 'earn' it.
To answer to the original question - I served successfully a stint as an Infantry Squad Leader followed by Platoon Sergeant in the same platoon, but wasn't given orders to be a PMOS of 11B. I did return to the Scout Platoon to be their PSG though.
Hope this helped.

My son and a friend of his both enlisted for the GA NG program. My son selected 19D Cavalry Scout; his friend chose 11B Infantry. Upon return to their units, my son was told he had been re-classed 11B. You got it - his friend was re-classed 19D. All without attending any further training.

I don’t know about todays army but believe it or not i floated between 3 MOS through out my 22 years on active duty. I never did AIT after basic or any other time. It was all OJT. I retired in 1982 as an E9.

The only way to avoid AIT or reclass is if you can prove MOS proficiency thru OJT or thru Army Civilian Acquired Skills Program (ACASP). OJT is very difficult because you have to do a packet where you are evaluated by an E7 or above in that MOS in specific tasks and the Commander certified that you demonstrated proficiency. The first GO in the chain has to approve it. They rarely do, I seen it only once and that individual had a lot of civilian training. ACASP is easier but you have to provide specific civilian certifications depending on the MOS you want.

For all concerned this information can be found in DA PAM 611-21 Chapter 10. It lists formal training requirements and waiver requirements if possible for all MOS. I can and will request a ACASP waiver.

you’ll get chaptered