In addition to this, there are some restrictions on your choice of retainer's job based on which class you choose for them:
(N.B. Much of this is info already provided above. I'm just including it for clarity and having it all in one place.)
- When you hire a retainer (or reset it back to level 1) you first must choose a class: Gladiator, Marauder, Pugilist, Lancer, Archer, Conjurer, Thaumaturge, Arcanist, or Rogue.
- You can choose a job for your retainer with the following restrictions:
- All of the classes can change to their associated ARR job once they have reached level 30. E.g. Gladiator can become a Paladin, Marauder can become a Warrior, Archer can become a Bard, etc. You must also have the job at level 50 on your own character to be able to choose this for your retainer.
- All of the classes can change to any of the Heavensward, Stormblood or Shadowbringers jobs once they have reached the required level: 50 for HW and SB jobs (DRK, AST, MCH, RDM, SAM) and 60 for ShB jobs (DNC, GNB.) You must also have the job unlocked and meet the same level requirement with your own character to be able to choose this for your retainer.
- Classes cannot become ARR jobs that are not associated with their class. E.g. Archer retainers cannot become Paladins, Warriors, Monks, Black Mages, Scholars, etc.
- Once a job is selected it is locked in. You cannot change from one job directly to another job or even change back to a class. This is of special importance if you want one of the HW, SB or ShB jobs because you will need to keep the retainer as a class until they reach the necessary level. I.e. Switching to the ARR job when it becomes available will lock you out of the HW, SB and ShB jobs.
- You can reset a retainer to erase all of their progress and start over. E.g. if you want to change from Machinist to Gunbreaker, or from Arcanist to Bard then you would have to reset your retainer and choose a class option that would allow choosing the desired job. Choosing the Archer class would work for both of these examples.