Mark Leslie qualified as an architect at the Harvard Graduate School of Design in 1977.  In 1986 Mark setup Martello as the digital presentation arm of his architectural practice. In 1992 this became Martello Multimedia a pioneering interactive multimedia production studio.   Martello Media was incorporated in 2000 to provide exhibition design and build services internationally.  In 2017 changing procurement conditions and the diversity of activities led the Martello team to restructure as associates  – distinct specialised entities that can work individually, or in collaboration, as required.  These include:- Martello; MakeDot;  ThoughtDifferent; DMW Creative; and Storyline.