Susan Margaret Pennicuik (/ˈpɛniːkuː/ PEN-ee-koo;[1] born 17 April 1957) is an Australian former politician who served as a Greens member of the Victorian Legislative Council from 2006 to 2018.

Pennicuik studied Arts at Monash University and later Applied Science, majoring in Physical Education, at the former Footscray Institute of Technology.

She then went on to work as an environment officer for the Australian Manufacturing Workers Union, later obtaining a Masters in Environmental Science from Monash University.

She then worked a coordinator for the Occupational Health and Safety Unit of the ACTU from 1997 to 2004, which conducted research and produced OHS information for unions.

[14] Following the resignation of councillor Neil Pilling in 2021, Pennicuik was elected to Glen Eira City Council following a countback of votes on 27 April 2022.