Kammala wannan jumla: A lokacin da yake da shekaru takwas, Maguire ya fara wasan kwando na keken hannu, inda Josie Cichockyj ya horar da shi. Yanzu yana horarwa a Kirkby Athletics Club. Magurie ya lashe gasar marathon na kasa da shekaru 17 a gasar
2014 da 2015 London Marathons. A cikin 2016, Maguire ya kasance wani ɓangare na ƙungiyar relay na mita 4 × 400 na Burtaniya wanda ya lashe gasar zakarun Turai ta 2016 IPC Athletics ba tare da lambar yabo ba.