T.H.O.R.N

Description
While best known as the founder and CEO of Galactic Solutions Industries, Addalar Hyland has also made a name for himself as a philanthropist, using his vast wealth to further the causes he deems most worthy. One such cause is the eradication of the rakghoul plague, for which he has created The Hyland Organisation for Rakghoul Neutralization, or THORN. Tasked with searching for a cure to the plague while also stomping out major planetary infestations, THORN regularly accepts talented volunteers, who are affectionately referred to as "Neutralizers"

Source
You are only able to run missions to increase your THORN reputation during the Rakghoul Plague recurring events.