User blog comment:Argali1/A Theory of Mine/@comment-26237442-20160414161112

where do the Guavian death gang members help the First Order? as for being a part of the imperial militia seeing that the gang acts in many ways like a cult (the initiation involves a creed and cybernetic implants) which is somewhat un-imperial (especially since Dengar was a secret imperial experiment and is in many ways similar to a primitive version of the Guavians)

On the other hand my Sources (the visual dictionaries which are canon) also indicate that the gang was displaced after the fall of the Empire and de-centralisation of the senate (they had a strong presence on Courascant appearantly) this could mean that they had ties with the empire.