1

Magos Master of technological achievement.
A Magos is generally held to have attained mastery in a particular field and usually pursues his specialism single-mindedly.  They are accomplished researchers and what original research and invention is done within the Adeptus Mechanicus is usually conducted by Magi.

2

Logis Resolve: {Logistician|Analyst|Statistician}.
A Logis is often regarded as something akin to a soothsayer for his ability to divine future trends and make sense of mountains of information. Though commonly associated with bureaucracy and logistics, their knack for analytics can be lent to almost any discipline imaginable.

3

Genetor Master of genetic manipulation and matters biological.
Their influence is subtle but widespread in the domains of Man, as it often falls to them to ensure the multitudes of humanity are fed and free from disease. They are also responsible for the cloning of servitors, workers and warriors, and even for matters relating to Astartes geneseed.

4

Artisan Master of construction and applied engineering.
Artisans are responsible for designing and building the advanced structures and machines on which the Adeptus Mechanicus and Imperium rely. Artisans can either work on various advanced projects themselves directly, or they can be in a position to oversee and manage entire factories thronged with servitors and workers.