Chief petty officer

Chief Petty Officer is the seventh enlisted rank of the UNSC Navy and is a non-commissioned officer. It is equal in rank to Gunnery Sergeant in the UNSC Marine Corps.

In informal settings, Chief Petty Officers are typically called "Chief".

Tech Chief
Tech Chief is a Technician rank in the UNSC Navy. It is a Specialist rank.

The Tech Chief's job is to make sure all technicians are working hard and provide moral support. The rank of Tech Chief requires hard work as a technician to attain.

Tech Chief's also provide technical support wherever they are needed. However, they mostly assume command of Tech Officers in the First to Third Class, making sure their sectors are covered and the layout of Technicians are fine and that all stations are manned.

They are specially trained in technical issues and help keep UNSC ships running. Almost every ship requires technicians to run. UNSC Technicians usually wear color-coded uniforms to help others differentiate, rather than to read a small badge during hectic combat conditions where every second counts. Tech Chief's are the highest rank a Technician can attain.

Technicians are usually armed with M6D pistols in case of boarding actions, and they can use their hard-hitting and effective side-arm to hold off hostiles long enough until friendly support, probably in the form of UNSC Marines, arrive. However, some remain unarmed, preferring to keep their hands free.

Technicians, although usually in combat areas, have probably received little or no combat training. It is not unusual to see technicians cowering in fear during combat situations.

Tech Chief appearances
Technicians appear in Halo: Combat Evolved and Halo: PC, in the level "Pillar of Autumn ". Some are shown holding M6D pistols fending off Covenant boarding parties, while a few are unarmed.