Michel Mossessian (born 11 November 1959) is a French architect of Armenian origin, based in London, UK.

He was a recipient of the Villa Medicis Hors les Murs fellowship and went on to the Cooper Union School of Architecture[1] in New York, where he studied Advanced Design.

Along with Senior partner, Larry Oltmanns, they made a successful bid resulting in the design and completion in 2017 of the new NATO headquarters in Brussels.

In 2011, the company won an open international competition for an urban renewal project in the Medina of Fes, Morocco which is now on site.

"[11] His original Black Box method has become a staple of every project the practice delivers and ensures a shared vision from the outset.