WSS will be responsible for building the brand profile of the England defender who moved from West Ham United to Leeds United for £18m ($25.5m/EUR29m).
"The potential for Rio to grow in stature both on and off the field is limitless and we are confident that WSS will play a significant role in his development as a footballing ambassador," said Michael Farnan, chief executive officer of WSS.
The AIM listed company provides branding and marketing solutions across a variety of sports including golf, rugby, cricket, football and motorsport. Its clients include Williams F1, Leeds United FC, Luis Figo, David O'Leary, Paul Lawrie, The Gary Player Group, Richard Johnson, Usman Afzaal and Brian O'Driscoll.
