Chirurgeon

Chirurgeons were San'Shyuum biomedical specialists in the Covenant's Ministry of Preparation.

Overview
Chirurgeons were dedicated to unlocking the Lifeworker secrets locked within the Forerunner keyship, Anodyne Spirit, simply known to the Covenant as "the Dreadnought". Staffs of them were stationed aboard specialized refit fitted with arcane instrumentation. The chirurgeons on these ships and those on High Charity were responsible for the creation of Prelates, biologically-enhanced San'shyuum used in specific combat roles.

Trivia
Chirurgeon is an archaic term for surgeon.