Captain D. F. Lambert (UNSCMID 03981762) was an UNSC officer with the UNSC Engineering Corps in 2491. That year, he was the leader of the first planetary survey team to Onyx. He created ENGCORP Field Report A76344, in which he documented the curious anomalies of Onyx's tectonic activity and natural habitability. He then recommended the planet for colonization.[1]


  1. Halo:Ghosts of Onyx, page 123