[citation needed] She worked on short projects in the Political Affairs Department (Centre Against Apartheid) at the United Nations in New York City and at the Political Affairs Department of the Council of Europe in Strasbourg.

[citation needed] In 1994 Willemijn Verloop visited the war zone of Bosnia and Herzegovina and met an English professor of Music Therapy, Nigel Osborne, who gave creative workshops to children traumatized by war in the shelters of Sarajevo and Mostar.

[citation needed] Through War Child, she pioneered corporate social responsibility in the Netherlands, such as by starting innovative partnerships and sponsorships with the commercial sector (for example, Ben & Jerry's).

[citation needed] From the mid-1990s she was seen as a frontrunner within the sector for low overheads and transparency in financial and operational reporting.

[5] What is stated in many interviews with her, is the innovative way the brand War Child was launched in the market, the business approach, low overhead, with innovative marketing, positive messages, catchy videos & clips, the use of music and entertainment industry as well as new spectacular fund-raising events such as the Friends for War Child concert.

[6] In her fifteen years as Director of War Child, she was a familiar guest in many television programs in which she stood up for human rights, culture and social development.