 In the summer of 2009, Buijs joined ADO Den Haag, after already being on loan with the team for ½ year.He signed a contract for 2 years.However, ADO Den Haag struggled in the Eredivisie in Bujis first season there and, on 14 April 2010, English Football League Championship side Derby County announced they had agreed a deal to sign Buijs for the start of the 2010–11 season.