As principal designer of Associates & Ferren, Ferren went on to lead many high-profile projects, such as special effects for the Paul McCartney World Tour, R.E.M, Depeche Mode, Pink Floyd, and visual effects for "Little Shop of Horrors". He was a technical consultant for the films "Impostor" and "Fat Man and Little Boy", and designed the titles for "Simon, Dirty Rotten" "Scoundrels", "Guilty as Sin", and "Little Shop of Horrors". In addition to special effects, they were considered leaders in advanced projection, simulation and laser effects technology, and provided customized equipment for dozens of major road tours, and stationary installations.