 All business activities were handed over to "ISM eCompany (Innovative Solutions in Media)" in 1997, the company of which De Jager was CEO until his appointment to the cabinet on 22 February 2010.In 2008, Sana Commerce (B2B e-commerce software vendor) has become a subsidiary of ISM eCompany.Besides his work as managing partner of the Rotterdam internet agency ISM eCompany (which he co-founded in 1992) and Sana Commerce (B2B e-commerce software) from 2008, De Jager is socially involved in different activities.