After working for the Department for Education as a policy advisor, she became a contestant on the fourth series of Love Island (2018) and subsequently appeared on The X Factor: Celebrity (2019) and Made in Chelsea (2019–2020).

McDermott has gone on to present her own BBC documentaries, including: Revenge Porn (2021), Uncovering Rape Culture (2021) and Disordered Eating (2022) based on her own experiences, as well as Gaia: A Death on Dancing Ledge (2023), The Idaho Murders: Trial by TikTok (2024) and Inside Ibiza (2024).

[1][2][3] In 2009, McDermott, her parents and her younger brother Brad appeared on the BBC television series Wanted Down Under, where they considered moving to Australia.

The same month, McDermott began appearing as a cast member on the E4 reality series Made in Chelsea, alongside Thompson.

After departing from Made in Chelsea, she explained that she wanted to move on from short-term brand deals and reality television to focus on making documentaries.

Also in 2024, she is set to present a four-part documentary series for the BBC titled Ibiza: Secrets of the Party Island.