the summer of 2011. He joined Beerschot following the 2011–12 season. In June 2013, Koster signed a contract with Club Africain. Although the club was first in the league, Koster was sacked in January 2014. In March 2014, Koster was named head coach of the Netherlands U21 team, after successfully managing the Netherlands U20 team in 2012. On 25 November 2014, Koster started to work for VfB Stuttgart as field coach of Huub Stevens. On 26 August 2015, Koster was appointed assistant national team coach of Saudi Arabia, where he came to work under the national coach, fellow Dutchman Bert van Marwijk. On 1 July 2018, Koster was appointed head coach of Willem II for the second time in his career. He managed to qualify the team for the KNVB Cup final for the fourth time in club history, in which Ajax, however, proved too strong and won 0–4. Because they made the final, Willem II qualified for the UEFA Europa League for the first time since 2005. Willem II also avoided relegation in the Eredivisie. References External links 1954 births Living people Dutch footballers Netherlands international footballers Dutch football managers Dutch expatriate football managers Association football wingers PSV Eindhoven players Roda JC Kerkrade players Eredivisie players Willem II (football club) managers Roda JC Kerkrade managers Helmond Sport managers TOP Oss managers Excelsior Rotterdam managers VVV-Venlo managers RKC Waalwijk managers AFC Ajax managers Jong Ajax managers Club Brugge KV head coaches Eredivisie managers AFC Ajax non-playing staff UEFA Euro 1980 players Footballers from Zierikzee Club Africain football managers Beerschot A.C. managers Expatriate football managers in Belgium Expatriate football managers in Saudi Arabia Expatriate football managers in Tunisia Expatriate football managers in Germany Dutch expatriate sportspeople in Belgium Dutch expatriate sportspeople in Saudi Arabia Dutch expatriate sportspeople in Germany Willem II (football club) non-playing staff