Former <a href="https://www.cricketcountry.com/teams/australia/">Australia</a> bowler <a href="https://www.cricketcountry.com/players/jason-gillespie/">Jason Gillespie</a> will leave his role as Sussex coach at the end of the ongoing 2020 season, the English county announced Tuesday. A statement from the south coast club said Gillespie would be returning to Australia to take up a role with the South Australian Cricket Association. <p></p> <p></p>It appears Gillespie, already in charge of the Adelaide Strikers as well as Sussex, is set to become the new coach of the struggling Rebacks -- a move that would put South Australia's Big Bash League and first-class teams under the control of one man. <p></p> <p></p>He will, however, remain at Hove as Sussex coach until the end of the current campaign. <p></p> <p></p>Former fast bowler Gillespie represented South Australia while also winning 71 Test caps as a member of the powerful Australia side of the mid-1990s to early 2000s. <p></p> <p></p>Having played county cricket in England, the now 45-year-old Gillespie made a successful switch into coaching, guiding Yorkshire to successive County Championship titles in 2014 and 2015 before joining Sussex at the start of the 2018 season. <p></p> <p></p>It was only last year that Gillespie, tipped as a possible England coach before the role went to Trevor Bayliss, a fellow Australian, signed a contract extension with Sussex until the end of the 2022 season. <p></p> <p></p>'Sorry to see Jason leave' <p></p>"We are very sorry to see Jason leave after three years at the club, but fully understand and support his decision to return home to a new role in South Australian cricket," said Sussex chief executive Rob Andrew. <p></p> <p></p>"He will stay in Hove to see out our season and continue the great work with the development of our young and exciting team." <p></p> <p></p>Andrew, a former England rugby union fly-half, added Sussex would not be making a decision on Gillespie's replacement until 2021. <p></p> <p></p>Gillespie coached the Strikers to the BBL title in 2018 and has taken them to the finals on two other occasions, including last season. <p></p> <p></p>But at the same time South Australia's form has declined alarmingly, with the Redbacks winning just four out of 29 matches in the Sheffield Shield, Australian cricket's domestic first-class competition, during the past three seasons. <p></p> <p></p>That run of results saw Jamie Siddons, Gillespie's former state captain, leave his post as South Australia coach earlier this year. <p></p> <p></p>SACA commissioned a high performance review led by Michael Hussey, with the former Australia batsman recommending the Redbacks and Strikers be brought under the control of one coach.