Gareth Davies helped establish the Rainier/Loewy agency three years ago and has over seven years of experience in B2B and B2C comms, for companies such as Intel, Walt Disney Internet Group and Toshiba.
He was also part of the marketing team that launched the Egg credit card.
The head of digital role is newly-created.
MS&L has also appointed a new director in its corporate group.
Prior to joining MS&L, William Hart was an associate director in the corporate practice at Nelson Bostock Communications (NBC) in London where he led a team of eight managing corporate communications for Canon Europe.