Office of Naval Intelligence

You may be looking for the LOTM organization from the B Team Storyline.

The Office of Naval Intelligence, or ONI for short, is an intelligence agency from the Halo Universe.

ONI is the primary intelligence service branch for the UNSC Navy. It's primary functions are to provide intel for the Naval Forces of the UNSC and to ensure aquisition and development of military equipment.

It is lead by Admiral Serin Osman.