Twilight's talent is magic: she is a librarian.
Rainbow Dash's talent is flying: she is a weather pony.
Pinkie's talent is parties: she is a baker.
Celestia's talent is moving the sun: she is a ruler.
Shining armor's talent is (i think) barrier magic: he is the captain of the guard.
Ones Cute Mark dose not dictate ones job; only ones talent.