Antwerpen began his coaching career with lower league clubs VfB Günnigfeld and SV Burgsteinfurt.[3] In the 2011–12 season he took over the U19 team of Rot Weiss Ahlen.[3] A year later, he became manager of the first team.[3] After one season, he took a sabbatical, before returning towards the end of the 2013–14 season.[3]
In January 2019 it was announced that Antwerpen and his staff would be leaving 3. Liga club Preußen Münster at the end of the 2018–19 season.[4]
Antwerpen was appointed manager of 3. Liga side Würzburger Kickers in September 2020.[5] On 9 November 2020, after four losses in the league, he was sacked.[6] In January 2024, he took over Waldhof Mannheim.[7]
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