
In their new roles, they will oversee trading and develop long-term plans for the business.
Butler will work with agencies and clients from Aegis, Publicis, Starcom and Magna, while Winterson will manage Pearl & Dean's relationship with Group M and Opera.
They will also help develop projects, including raising the profile of research tools such as Movietalk focus groups and the potential of 3D technology.
Prior to joining Pearl & Dean eight years ago, Butler worked as an account executive for an online start-up company. Winterson worked as a commercial development executive at Dennis Publishing before joining Peal & Dean in 2003.