Metallurgist
Concept · Stellaris 4.5.2
Metallurgist in the Stellaris encyclopedia: … … turn Minerals into Alloys.
Metallurgist in the game's words
The encyclopedia entry as the game shows it in its tooltips; underlined words open their own entry or page here.
… … turn 
Minerals into Alloys.
Highly trained workers are needed to turn raw minerals into the durable alloys that are used in a wide variety of advanced construction.
Entries that mention Metallurgist
Source: common/game_concepts (concept_metallurgist, also concept_metallurgists) and localisation/english, Stellaris Cygnus v4.5.2 (9776).