De Jager studied at the Nyenrode Business University where he received his Bachelor of Business Administration degree in 1990. Subsequently, he studied at the Erasmus University Rotterdam where he obtained an Master of Science degree in Economic sociology and Business economics in 1994.
He served as State Secretary for Finance from 22 February 2007 until 23 February 2010 in the Cabinet Balkenende IV. De Jager became Minister of Finance following the resignation of Wouter Bos and served for the remaining parliamentary period of the Cabinet Balkenende IV. After the fall of the Cabinet Rutte I, De Jager was succeed as Minister of Finance on 5 November 2012 and returned to the businessworld. He also obtained an Master of Laws degree at the same university in 1996. In 1992, while still at university, De Jager founded Information technology company Spectra Vision.
All business activities were handed over to Institute for Supply Management eCompany (Innovative Solutions in Media) in 1997, the company of which De Jager was Chief Executive Officer until his appointment to the cabinet on 22 February 2010.
In 2008, Sana Commerce (Business to business e-commerce software vendor) has become a subsidiary of Institute for Supply Management eCompany. State Secretary for Finance De Jager was State Secretary for Finance in the Cabinet Balkenende IV from 22 February 2007 to 23 February 2010.
His portfolio was Fiscal Affairs. De Jager took part in the 2008 G-20 Washington summit on financial crisis in Washington on 15 and 16 November 2008.
De Jager would actually participate as acting Minister of Finance in the program of the Finance ministers.
After consultation with the White House was decided that De Jager (currently the highest representative of the government in Washington) could participate in the summit as head of government. De Jager advocated by the Dutch contribution to the need to improve monitoring in a more prominent role of the International Monetary Fund and World Bank. Minister of Finance On 23 February 2010 following the resignation of Wouter Bos, and with him all the Labour Party members from the Cabinet Balkenende IV, De Jager became Minister of Finance.
He worked on the 2011 budget and on 14 October 2010 De Jager remain as minister in the First Rutte cabinet.
With Frans Weekers as State Secretary. On 26 February 2012 former Minister of Finance Onno Ruding, told in the program Eva Jinek on Sunday to have regular contact with De Jager on specific topics.
In 2011, De Jager said that he is in a relationship with a manitoba
Foreign his contribution to the success of the company he worked and his efforts in various Information and communications technology and innovative ancillary, De Jager received the Information and communications technology ity 2006 Award of interbranch Information and communications technology ~ Office.
De Jager remained as Minister of Finance following the formation of the Cabinet Rutte I after the Dutch general election of 2010, after he served a short term as a Member of the House of Representatives from 17 June 2010 until 14 October 2010. He was a member of the executive board of the Christian Democratic Appeal and organizations of various social and economic issues.
