Jonathan co-founded the media group PHD, selling to Omnicom after six years. Jonathan remained UK President until 2007, by which time his company had a turnover of £8 billion in 55 countries.

In 2006 he became a columnist for the Guardian and non-executive chairman of Mama Group, managing Kaiser Chiefs, amongst other bands. He was also a columnist for both Marketing Week and Media Week.

In 2007 he became a housemate on the eighth series of Big Brother, leaving after a month when his grandmother died. He became a partner at the advertising agency MCBD and the following year was made creative partner of MPG Media Contacts.
In 2008 Jonathan published his first novel, Essex, Drugs and Rock ‘n’ Roll, which sold out after an extensive, self-funded television, poster and press advertising campaign and has recently completed a screenplay of the book, co writing it with BAFTA nominated writer Simon Riley.

Jonathan joins borkowski.do as Head of Arguments; stress testing campaigns and developing creative content.