After graduation, Duke worked as a teacher and later as a trade unionist, serving as the President of the Tobago branch of the Public Services Association (PSA) from 2001 to 2015.
The TOP is a progressive political party that advocates for greater autonomy for Tobago as well as regional issues.
[3][4] Duke has been a critic of the government's handling of the COVID-19 pandemic and has called for greater transparency and accountability in the management of public funds.
[6][7] TOP has called for a referendum on Tobago's political status, arguing that the island should have the right to determine its own future.
Duke and the TOP believe that independence for Tobago would allow the island to fully realize its potential and to pursue its own development goals without interference from Trinidad.