Síofra Cléirigh Büttner represented Ireland in the women’s 800 metres at the Tokyo 2020 Olympic Games, finishing 7th in her heat and narrowly missing the semi-finals.

From Booterstown, Dublin, she attended Coláiste Íosagáin where she set a piece of Irish schools history by winning six consecutive All-Ireland cross country titles – the first athlete ever to win all six possible titles across a secondary school career. She won silver in the 1500 metres at the 2011 European Youth Olympics.

She narrowly missed qualification for Rio 2016 by less than half a second, a near-miss that drove her focus towards Tokyo. She attended Villanova University in Pennsylvania, a school with deep Irish athletic traditions, where she won a rare triple at the Penn Relays and graduated with a BA in Communications in 2018. She joined Team New Balance Boston as a professional after graduation and competed on the international circuit. Her personal best of 2:00.58 in the 800 metres was set in February 2021 in the lead-up to Tokyo.