John Sier

John Sier has a solid work experience spanning several years. John started their career at International Card Services (ICS) in 1992, where they held various roles. John began as a member of the Facility Services team from July 1992 to December 1998. Following this, they transitioned to the Senior Acceptance Consumer Cards role, where they worked from January 1999 to December 2014. During this time, they also took on the role of Senior Acceptance Commercial Cards from January 2014 onwards.

Additionally, in 2022, John Sier became the owner (Eigenaar) of a company named Zen Time. No specific end date is provided for this role, indicating that they currently hold this position.

John Sier attended Coornhert Mavo from an unknown start year until 1987, during which they did not pursue a specific degree or field of study.