Delivering Devils is the second mission in the UC Vanguard questline in Starfield. To access it, players must have joined the UC Vanguard, the largest faction in the game, and completed the probationary mission called Grunt Work.
Starfield UC Vanguard Mission - Delivering Devils
Starfield players can find out what the unusual Terrormorph samples mean by completing the Delivering Devils mission and finding Dr. Walker.