He replaces Andrew Hirsch, chief executive of John Brown Media, who has held the position for the past three years.
Adams, the former UK managing director of iProspect who became Havas Media UK chief executive in September, will take up the CMA chairperson role in January.
Since April 2015, Adams has been a member of the CMA’s management team as a director. The rest of the CMA committee includes: Clare Broadbent, chief executive of Cedar; Sean King, chief executive of Seven and Vince Medeiros co-owner and publisher of TCO London.
Clare Hill, managing director of the Content Marketing Association, said: "Over the past three years, the CMA has been through a huge transformation, with Andrew as a driving force in helping us deliver a new value proposition and positioning it as the centre of excellence for all things content marketing.
"I would personally like to thank him for his invaluable support, whilst welcoming Matt to the role.
"He has been a big supporter of the CMA and content marketing in recent years and it’s wonderful that he has taken on the Chairperson role."