Ryann Siembieda was a tech sergeant in the Dendarii Free Mercenary Fleet who repaired and maintained battle armor and other equipment.

He died from a gravitic grenade when a Cetagandan death squad attacked Admiral Naismith on Mahata Solaris, but was cryogenically frozen and successfully revived on Earth. After his revival, Siembieda had no memory of any of the events of the day of his death.