Schoo began his career as an editor and writer for
Montessori Communications, a publication of the Dutch Montessori Association. He then worked for a psychology publication before joining
Elsevier in 1991 as a columnist, rising up to become deputy editor and then chief editor from 1993 to 1999. Politically, Schoo took on a conservative slant and was critical of multiculturalism in his opinion columns. One of Schoo's most notable acts as editor was appointing sociology professor
Pim Fortuyn as a columnist in 1993. Both Schoo and Fortuyn would influence each other's beliefs, and the column helped Fortuyn to gain more public exposure in the Netherlands before he embarked on a political career. At the end of 1999, Schoo resigned from Elsevier to become deputy editor-in-chief of
de Volkskrant. ==Personal life==