She is a member of parliament for the Democratic Alliance and the party's former shadow deputy minister of environment, forestry and fisheries.
For the 2019 general election, she was the party's campaign manager in the eThekwini Metropolitan Municipality.
[3] On 5 June 2019, the DA parliamentary leader, Mmusi Maimane, appointed Winkler to the post of shadow deputy minister of environment, forestry and fisheries.
[2] On 5 December 2020, she was appointed as an additional deputy member to the tourism portfolio of the John Steenhuisen's shadow cabinet.
[5] Winkler became an Additional Member on the Forestry, Fisheries and the Environment portfolio of Steenhuisen's shadow cabinet on 21 April 2023.