During the initial stages of his career, Kuipers refereed the 2006 UEFA European Under-17 Championship Final between Czech Republic and Russia in Luxembourg and also the 2009 UEFA European Under-21 Championship final between Germany and England in Sweden.
Kuipers refereed the 2006 UEFA European Under-17 Championship Final between Czech Republic and Russia in Luxembourg and also the 2009 UEFA European Under-21 Championship final between Germany and England in Sweden. This was during the initial stages of his career.