The newly created role is part of a major restructure at Wavecast Pro.
Dewe joined The Economist as director of conferences and events in 2006, before being promoted to his previous role in 2011.
Alex Bridges, founder and chief executive officer, said: "We have spent the last six months building a new suite of products and we have appointed Jonathan to prepare the business for our next phase of growth. He brings a great depth of knowledge and experience in creating content and event solutions and I'm delighted to welcome him. It's an incredibly exciting time for content marketing and we look forward to launching this new range of products in the new year."
Dewe added: "I am honoured to be joining Wavecast Pro. Wavecast have been pioneers in the live stream arena and having seen the new products, I see a bright future. We have a lot to do for the new launch over the next few months and I'm looking forward to the opportunities and challenges ahead."