Those who are masters of 'mental gymnastics.' This is commonly misinterpreted as telepathy but is actually a result of training the mind to absorb as much information as humanly possible and analyze it at a rate that would leave most people drooling.

There are two primary branches AelthriJun, and AlethriTix
AelthriJun is easier for women to learn, the reason for this is unknown, it is concerned with espionage, data gathering, and data analysis.
AlethriTix is easier for men to learn, the reason for this is unknown, it is concerned with battlefield action, tactics, survival, and martial skills.

Typically a job that accompanies "wet work" like assassination.

Alethric Arts, AJun, ATix

Lie Reading: the ability to tell if someone is lying based on the movement of their physiology.

Unknown (KAELI IF YOU WANNA FILL THIS IN GO FOR IT) :)

Unknown (KAELI IF YOU WANNA FILL THIS IN GO FOR IT) :)

none, it is more of a lifestyle that turned into a job

Many choose to focus on their entire subclass training, but it is possible to only learn and use the Assassination techniques (for example)

Unknown (KAELI IF YOU WANNA FILL THIS IN GO FOR IT) :)

Priests

The Alethricists originated from a religious sect that strove to contact god by mastering the mind, so those who are fundamentalists of the Alethrisists still strive for contact with a higher being, ironically, this is what lead to the realization that Magi could be summoned.