The Mechanist Worker is a Mechanist who has no combat skills, having instead devoted his time to learning and carrying out Mechanist research and construction techniques.
The Mechanist Worker is extremely rare only encountered three times during Thief II: The Metal Age. The first Mechanist Worker appears in Framed in Shoalsgate Station. Another can be found in Trail of Blood as an apparition who will not harm, or take notice of Garrett in any way. The only other living Mechanist Worker is Brother Cavador, in Kidnap who must be located and kidnapped.
Mechanist Workers, though they cannot attack, still behave in a similar way to their weapon-wielding brethren, saying the same sentences when aware or suspicious. When alarmed, they will immediately run for help, shouting mechanist like phrases instead of the Servant.