A pirate captain, Jiro attempted to salvage a transport that carried the Sith brothers Darth Maul and Savage Opress. Maul throttled Jiro with the Force, and made the attentive pirate an offer: his life spared as well as a trove of riches in exchange for his servitude. Jiro agreed to follow the commands of these new, impressive crime lords and offered to recruit more pirates. When Maul's bid to conquer Florrum failed, Hondo Ohnaka reminded his former pirates that their new Sith allies had no interest in helping them. Hondo called on all his pirates to pillage the now undefended cargo vessel used by the Sith, earning their loyalty once more by appealing to their boundless greed.
Jiro was one of Hondo's pirate crew -- a group that would never be characterized as trusting. They could be counted on to follow their own greed, and this is how Hondo kept them under control.
Upon his recruitment by Darth Maul, Jiro tried bringing in other Weequay followers: the pirate captains Sabo and Goru. Sabo held out, not wanting to betray Hondo, so Maul ran him through with a lightsaber.
Maul's grand plan of conquest relied upon the recruitment of underworld forces to build an army. However, his first bid to do so failed when he attempted to recruit the shifty Weequay pirates.