Grisha are purveyors of the Small Science. At one point in my life, I was incredibly good at controlling the wind which made me a Squaller. Now, I can control wind, fire, and water, and I have the ability to change the properties of a solid material. That is not the full extent of my abilities, but I think it should give you the gist. I led an army of Grisha for years. I was their General. I've never known a "normal" job.