Jameson Locke currently serves as the leader of Fireteam Osiris. Intelligent and quick to solve complicated political and tactical situations, Locke was recruited into the Spartan-IV program in 2556 to lead dangerous and sensitive missions in the former Outer Colonies.
Formerly an acquisitions specialist in the Office of Naval Intelligence (ONI), Locke is an expert in tracking, asset recovery, and elimination of high value targets. Often tasked with dangerous missions beyond the reach of UNSC support, Locke has garnered an impressive string of successes in the field.
As of August 2558, Spartan Locke has participated in a number of low-profile but critical missions. Locke's operational history as an ONI agent remains classified.