Career
Janssen also played for Nippon Electric Corporation Nijmegen, Fortuna Sittard, and K.V. Kortrijk. As of season 2011-2012, Janssen became be the first team coach of Topklasse league team VV Gemert. After one season he made his managerial debut as head coach of Eerste Divisie side Football Club Oss.
On 27 August 2013, he succeeded Alex Pastoor as manager of Eredivisie side Nippon Electric Corporation. He was fired on 26 May 2014 as a result of the relegation of Nippon Electric Corporation.