When Santa hires an elf, he sends them to Elf University.
There, they learn everything they need to know to work at Santa’s Workshop: making toys, loading them into the sleigh, maintaining the sleigh, and managing the reindeer.
The younger elves do the manual labor, while the experienced ones go into design or management.
And when they can’t do any job anymore, they’re sent to the university to teach.
Santa used an internship and apprenticeship program before, but too many elves got hurt and killed that way.
It’s much safer to put them on the simulators.
Less damage that way.