Davies, who helped found the Junction Group three years ago, will lead EHS Brann's work on British Gas and will report to managing director Mike Home.
Davies helped build up a client list at Junction Group including HP, Citibank and Firetrap, and worked previously at TMW and WWAV London.
Davies said: "The past three years have certainly been eventful. However there are a number of exciting strategic developments at EHS Brann that I'm keen to be a part of. As an agency, it has formidable direct and digital credentials, great people and a host of opportunities for business growth following its successful merger earlier in the year."
The merger of EHSrealtime and Brann London was announced at the end of last year.
If you have an opinion on this or any other issue raised on Brand Republic, join the debate in the .