On 19 June 2013, Bosz was appointed as manager of his old club Vitesse on a two-year contract. Bosz replaced outgoing manager Fred Rutten whose contract had expired. In November 2013, Vitesse was top of the league in the Eredivisie for the first time since 2006. It was the first time since 2000 they'd been top of the league later than the first week. Halfway through the season, after 17 matches, Vitesse was the leader in the competition. The team finished 2013–14 season in sixth place. The following season, Vitesse finished fifth, qualifying for the European competition play-offs. Also, Bosz was nominated for the Rinus Michels Award (for manager of the year), but lost to Phillip Cocu, who had led PSV Eindhoven to the Eredivisie title. In the 2015–16 season, Vitesse was in fifth place in the winter break, after which Bosz left the club. Maccabi Tel Aviv In January 2016 Bosz was announced as the new head coach of Israeli champions Maccabi Tel Aviv. Bosz left Tel Aviv in May 2016 for Dutch team AFC Ajax. During his time in Israel, Bosz was undefeated in 19 games in charge, with 12 wins and 7 draws.However, Tel Aviv lost the title to Hapoel Be'er Sheva and Lost in the Israeli cup final to Maccabi Haifa. AFC Ajax In May 2016, AFC Ajax announced that Bosz was appointed to serve as the new head coach from July 2016 after signing a three-year contract. In his first competitive match as head coach, Bosz's side earned a 1–1 draw against PAOK in the Third qualifying round of the Champions League on 27 July 2016. Bosz was unable to lead Ajax to the group stage of the Champions League after losing 5–2 on aggregate to Russian side FC Rostov. On 11 September 2016, Bosz faced his former side Vitesse, as Ajax won 1–0. On 24 May 2017 Ajax were beaten 2–0 at Friends Arena, Stockholm in the Europa League final by Manchester United. Borussia Dortmund On 6 June 2017, it was announced that Peter Bosz would transfer to German club Borussia Dortmund. Since there was no buy-out clause in his contract with his previous club, Ajax received nearly €5 million for compensation in order to buy out his contract. It was a record buyout of a head coach for a German club, breaking the previous record of €4 million. After no wins in their