She is one of eight Democratic Alliance representatives in the provincial legislature.
Liebenberg was a councillor of the Sol Plaatje Local Municipality before she was elected to the provincial legislature.
She was re-elected as a councillor of the Sol Plaatje Local Municipality in August 2016.
[1] In 2018, Liebenberg criticised the African National Congress for electing Patrick Mabilo as Sol Plaatje mayor.
[4] She is the DA's spokesperson for agriculture, land reform, rural development and nature conservation.