Sebastian is a young and upcoming bowling all-rounder from Johannesburg, South Africa. He has played all his age-group representative cricket for the Johannesburg based Gauteng Lions and is currently part of their Colts academy team. 

Sebastian captained the Lions U19 team at the national Khaya Majola Cricket Week in 2019 and his strong performance saw him contracted into the Colts academy. He made his List A debut for the Lions senior team in 2020.