Jacob has come up through the Hockey Wales ranks since the age of 12. The midfielder began his career at Gwent hockey club before attending a school in North England where he played for Preston hockey club, obtaining his first conference premier league cap. He then later transferred to Cardiff & Met whilst attending university in Swansea. After finishing university, Jacob made his premier debut for Hamstead and Westminster, whilst also competing in the EHL. Since making his senior Wales debut in 2016, Jacob has competed in the 2018 Commonwealth Games and European championships division A and B. He is also part of the Great Britain senior squad, represented GB in the Tokyo 2020 Olympic games and has participated in multiple pro league games.