She was a Liberal Party of Australia member of the South Australian House of Assembly from 1993 to 1997, and was then Mayor of the City of Onkaparinga from 2006 to 2018.
[1] In 1993, Rosenberg was elected for a term to the South Australian House of Assembly representing the seat of Kaurna from 1993 to 1997 for the Liberal Party.
[3] In 2017 and 2018, a scandal over executive perks and misuse of council credit cards — costing ratepayers $70,000 in 18 months — came to public attention.
This included the purchasing of golf club memberships, roof-top climbs, taxis and hotels for council CEO Mark Dowd, and international trips for the mayor.
[5] Although initially intending to recontest, on 14 August, Rosenberg announced she would not run again for mayor at the 2018 local government elections.