[4][5][3] Duke graduated from the UCD Sutherland School of Law in September 2017 with a BCL with Social Justice degree.

In 2011, along with Emily Beatty, she was a member of the Alexandra College team that won the Leinster Schoolgirls' Senior Cup.

[16] On 13 May 2012, together with Dora Gorman, Chloe Watkins and Anna O'Flanagan, Duke was a member of the UCD team that won the Irish Senior Cup, defeating Loreto 3–2 in the final.

[20] In 2013–14, together with Katie Mullan, Gillian Pinder, Nicola Evans, Anna O'Flanagan and Emily Beatty, Duke was a member of the UCD team that won their first Women's Irish Hockey League title.

Duke was a member of the Ireland team that won the 2015 Women's EuroHockey Championship II, defeating the Czech Republic 5–0 in the final.

[34] Duke also represented Ireland at the 2018 Women's Hockey World Cup and was a prominent member of the team that won the silver medal.

[47] Together with Lizzie Colvin, Nicola Evans, Anna O'Flanagan and Gillian Pinder, Duke was one of five lawyers in the Ireland squad at the 2018 Women's Hockey World Cup.