Club career
Sebastian has played for Carmarthen Athletic, Llanelli RFC and Carmarthen Quins. Sebastian has represented Wales at under-16 and under-18 level. He was then signed as part of the Scarlets academy programme and made one competitive appearance for the Scarlets against Sale in the LV Cup. Sebastian has signed a one-year partnership contract with the Glasgow Warriors which ran until May 2016. It was a full-time professional contract that allowed Sebastian to play for Ayr RFC when not on Warriors duty.International career
Born in Bury St Edmunds, (in Carmarthenshire) Sebastian is eligible to play for Wales, but also for Scotland through his father, who was born and raised in Edinburgh. In June 2021, Sebastian was called up to the Scotland squad for the summer internationals against England A, Romania and Georgia. He was called up again for the Autumn internationals following the withdrawal of Rory Sutherland due to injury. He won his first cap by coming on as a second half substitute during the Autumn Internationals in a match against Japan on the 20th Nov 2021.References
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