After his sporting career Johan held positions as the National Inline team coach, and as a professional marathon team coach for 3 and 5 years respectively.
他在运动生涯结束后，其先后担任3年荷兰国家队轮滑教练员，5年职业马拉松队教练员。
Hazen also is an Adviser to the Guangdong professional baseball team and recently acted as an assistant coach and instructor on their team in the first ever-professional baseball tournament in China.
希臣亦为广东专业棒球队顾问。最近中国首届专业棒球联赛时，希臣为该队的副教练及指导员。
Hazen also is an Adviser to the Guangdong professional baseball team and recently acted as an assistant coach and instructor on their team in the first ever-professional baseball tournament in China.
希臣亦为广东专业棒球队顾问。最近中国首届专业棒球联赛时，希臣为该队的副教练及指导员。
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