Mullan is originally from Coleraine, County Londonderry, Northern Ireland. She has four siblings - two older brothers, Bernard and Aidan, and two younger sisters, Brega and Olivia. She attended Dalriada School in Ballymoney.[2][3][4] Mullan completed a BSc in Engineering Science in 2017, and her Master's degree (ME) in Biomedical Engineering[5] in 2018 at University College Dublin.[6][7]
Camogie
Mullan played camogie for CLG Eoghan Rua. She was a member of the Eoghan Rua team that won the 2010 All-Ireland Intermediate Club Camogie championship. She came on as a substitute in the semi-final against Lismore and scored the winning goal in a closely contested match. She also came on as a substitute in the final, a 3–8 to 2–3 win over Laois Harps. In 2013 Mullan scored two goals in the Derry Senior Camogie Championship final victory against Slaughtneil. She also scored 1–1 in the Ulster Senior Club Camogie Championship final against Rossa. Eoghan Rua retained the Derry Senior Camogie Championship title in 2014 and Mullan scored 1–4 in the final win over Slaughtneil.[6][8][9][10]
^"UCD – Women's Division One preview". www.hookhockey.com. 14 September 2012. Archived from the original on 1 September 2018. Retrieved 31 August 2018.