Woodford, the chief executive of DDB London until its merger with Adam & Eve last year, will focus on business interests outside of advertising.
A former chief executive of Engine and WCRS, and the IPA President from 2003 to 2005, Woodford stepped back to two days a week at Adam&Eve/DDB in January.
He joined DDB London as the chief executive in early 2007 and was one of the few senior DDB London executives who remained following the merger. It is understood that he will not be replaced at Adam&Eve/DDB.
Woodford’s business interests include Ffrees Family Finance, an alternative to the traditional bank account, which launched in early 2013. He also plans to launch another venture in the autumn.
James Murphy, the chief executive of Adam&Eve/DDB, said: "Stephen and I were architects of the merger right from the start and he’s helped us every step of the way. He’s witty, urbane and wise and I will miss his counsel."
Woodford said: "I wanted to see the merger through and it is working brilliantly. I’ve been two days a week at the agency since the beginning of the year, while I’ve spent some time on Ffres and some other new ventures outside of advertising.
"With the agency making excellent progress, I can now focus on these interests full time."