When Machinists aren't specialised enough to you, you study to become a Technicalist. In terms of plain stats, the two classes are very close to one another, although a Technicalist has a higher affinity for magic - again, the special sort of magic that only they seem to understand, but on an even more complicated level than most Machinists' efforts. In general, the work of a Technicalist is more intricate and delicate than their unsophisticated counterparts. They are the ones who make the components that allow gems to power airships, while Machinists build the actual hull.
Technicalists must use some sort of weapon to hit their enemies into submission. Some opt for blunt weapons, often their tools, but their higher magic stat allows them a little more leeway than Machinists are afforded. While they aren't able to pick up a normal gem and fire off some lightning bolts, a few Technicalists have managed to make their weird mechanical magic into offensive spells. One or two rudimentary mecha suits have been created, and some augmented limbs.
Like Machinists, Technicalists have solid job security, as the magical automation used by every country relies on them in some capacity. They are often wealthy, but incredibly busy, people. Their gadgets can help around the home - inventors have taken advantage of this and marketed small items to wealthy households, like automatic fire-starters or food coolers that improve their quality of life. These still require maintenance though, so only the upper class has access to this technology.