Plunket also served as the communications director of The Opportunities Party during the 2017 New Zealand general election. In late 2021, Plunket founded an online radio station The Platform.
As a key figure in The Opportunities Party, Plunket played a crucial part in their 2017 New Zealand general election campaign. Later on, in 2021, Plunket launched his own online radio platform, which he named The Platform.