The Storytellers wants to cement its position as a leader in using storytelling techniques to help business leaders drive cultural and behavioural change in their companies.
Man Bites Dog will create social media and content campaigns, build the profile of The Storytellers team and run its media office.
Alison Esse, joint managing director at The Storytellers, said: "Large businesses are experiencing unprecedented challenges, driven by changes in consumer behaviour, technology, competition and globalisation. This is a great time for us to prove the power of storytelling in driving organisational change to realise critical strategic imperatives."
Claire Mason, managing director at Man Bites Dog, said: "The Storytellers have an unrivalled track record of using narrative to help leaders realise strategy and improve performance, and we look forward to working with them to prove the importance of telling the right story in business."