The move comes as the company plans to expand its European and international operations during 2014, and in response to TRO's global growth this year, with offices opening in Singapore and New Delhi.
Wyrley-Birch, who has been shortlisted for this year’s Event 100 Club, has worked at the business for more than 15 years and took up the position of managing director two years ago. He was previously client services director.
In his new position, Wyrley-Birch will be responsible for TRO’s UK operations, as well as its EMEA offices in Frankfurt, Amsterdam and Paris.
Keith O'Loughlin, global chief executive officer at TRO, said: "TRO has enjoyed an impressive level of growth over the past five years, in difficult economic conditions, and we are now ready to move into the next phase of our exciting journey.
"With Michael at the helm we will continue to deliver world-class, innovative campaigns and events for our global clients, while expanding into new countries and regions."
Wyrley-Birch added: "It is an exciting time for the agency; 2013 has been an excellent year, with growth from within our existing client base, new clients and across territories.
"As the digital landscape and Google searches remove geographical barriers, we have seen brands begin to restructure their marketing activities into regions rather than countries. TRO is responding to these client needs by extending its presence around the world."
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