Lederman has been at US cable net Lifetime for the past seven years as senior VP, scripted programming and development.
At All3Media America she will work with its prodcos on US projects. All3 currently has on the slate The Arrangement, produced by Objective Productions USA, at E!, as well as several scripted projects in development at E!, A&E and Paramount.
“Finding the right executive to oversee the growth of All3’s scripted business in the US has been one of the leading priorities for the company,” said new All3America boss Greg Lipstone.
He added: “Nina is one of the smartest and most creative executives working in the industry and will undoubtedly be instrumental as we continue to build our scripted business alongside our already successful unscripted business.”