Reclaimators are a type of Tech-Priest.
Reclaimators are charged with salvaging materials from old and damaged systems and with oversight of the endless cycle of minor repairs needed to keep the technology of the Imperium operational. As a result they have a level of understanding of technology from the Dark Age better than most of their colleagues. They are frequently sent into dangerous or uncharted regions and often gather parts which they keep from their masters. As a result, they are often viewed as suspect and shifty individuals who become involved in the Black Market. Many have links to criminal gangs and more than a few are willing to steal or even kill to build up their spoils. They are sometimes used as members of an Inquisitor's retinue.