[citation needed] She joined the Organisation for Economic Co-operation and Development (OECD) in 1998, where she reported serious problems with its accounting system, raised her concerns with the management and suggested reforms.

[9] Andreasen was fully suspended from her job by the Commission in May 2002 (for "violating Articles 12 and 21 of staff regulations, failure to show sufficient loyalty and respect").

[10] In 2007 Andreasen became the Treasurer of the UK Independence Party (UKIP), which supported withdrawing the United Kingdom from the European Union.

[13] In April 2010, Andreasen announced her intention to apply for the vacant position of Director-General of the European Anti-Fraud Office (OLAF),[14] but there was no subsequent report that she had actually sent in such an application.

The party responded that it had made gains in the election and that her statement "displays what one might perhaps charitably call a naivety in its analysis of the UK electoral scene".

[16] In November 2011, she told RTÉ Radio 1's Morning Ireland that the Irish government's nomination of Kevin Cardiff to the European Court of Auditors should be withdrawn.