Answer
Bert van Marwijk was the head coach of the Netherlands national team from 2008 to 2012. He led the team to the final of the 2010 World Cup, where they lost to Spain. Frank de Boer was an assistant coach on van Marwijk's staff during this time. After van Marwijk's departure, de Boer was appointed as the head coach of the Netherlands national team in 2012.