UNSC Army Corps of Engineers
From Halopedia, the Halo wiki
The UNSC Army Corps of Engineers is a command of the UNSC Army, conducting engineering operations for the branch. One unit of the Corps of Engineers is the 412th Engineer Command. Personnel of the Corps of Engineers are trained in cutting edge United Nations Space Command technology and in reverse-engineering Forerunner and Covenant technology.
Following the Human-Covenant War, the UNSC Army Corps of Engineers participated in numerous conflicts against remnant factions of the Covenant. Sergeant Holly Tanaka served in the Army Corps of Engineering before enlisting in the SPARTAN-IV program in early 2557. During her time in the Corps of Engineers, in 2555, Tanaka participated in a joint-service exercise on Mars to simulate a second Covenant invasion in the Sol system. In 2556, part of the 412th Engineer Command, including Tanaka, was stationed aboard Paris-class heavy frigate UNSC Cascadia during its mission to Cleyell.
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