Stringer, who joined ten years ago, is pursuing legal action against the firm. Exposure asked Stringer to leave following talks about his future.
He had debated leaving the agency at the end of 2008 but talks resulted in an acrimonious split.
‘I didn't speak about just leaving Exposure. I talked about evolving my role to ensure continuity and stability for both staff and clients,' said Stringer. ‘In 2009 I wanted to become a non-executive director after building the proper management structure to enable me to take a step back.'
Joint CEO Raoul Shah declined to comment on the circumstances regarding Stringer's departure. ‘We are sad that Mark has left. He has done a great job over the past ten years,' said Shah. ‘We are in talks through our lawyers regarding a settlement, which is expected to be concluded shortly.'
Stringer made it clear he was unhappy with the board of Exposure.
‘After ten years of helping build up the business from a small fashion PR outfit into
a 140-strong, £20m international business, I felt it was appropriate to be transparent and honest about my long-term future plans,' he said.
‘I'm disappointed for clients and staff that an amicable solution wasn't reached, which is what I wanted.'
Shah is expected to announce plans for a replacement MD in the next month. Stringer sat on the board and handled the agency's blue-chip clients. He worked closely with the other joint CEO Tim Bourne.
Last year, the agency was forced to pay thousands of pounds for its involvement in a spat between The Daily Telegraph newspaper and actress Nicole Kidman (PRWeek, 21 December 2007 ).