Inferno partner James Tutt confirmed Jackson, who had worked as a board-level freelance consultant for August.One Communications since last year, declined to join Inferno.
Jackson told PRWeek he did not want to join the company because of its heavy focus on the Microsoft account - Next Fifteen transferred August.One's entire technology team, including Jackson, into Inferno in February (PRWeek, 4 February).
'When you have an account that is as big as Microsoft it is perfectly understandable for an agency to give it a great deal of care and attention,' Jackson said. 'But that does not cover what I want to do.'
Since leaving Next Fifteen two weeks ago, Jackson has been working as a freelance consultant for Hill & Knowlton. But he said he would not be joining another agency full time or moving to an in-house role.
He also ruled out starting his own PR firm.