Former senator Larissa Waters is back from a political hiatus, after being preselected as the lead Senate candidate for the Queensland Greens.

Ms Waters secured a resounding vote of confidence from the party, receiving 75 per cent of members' primary vote.

Former Greens senator Larissa Waters has been preselected for her old job. Credit:AAP Image/ Dan Peled

There were seven candidates in the running, including anti-Adani activist Ben Pennings.

Ms Waters resigned in mid-2017 after being caught up in the dual citizenship debacle, when she discovered she was also a Canadian citizen.