David is a playwright. His plays include The Events, The Strange Undoing of Prudencia Hart, Monster in the Hall, Midsummer, Dunsinane, Yellow Moon, Damascus, Outlying Islands, The American Pilot, San Diego, Pyrenees, The Cosmonaut's Last Message, Dr, Korczcak's Example, The Architect and Europe. David's adaptation's include The Suppliant Women, The Father, The Lorax, Lanark, Creditors, and Caligula. In 1990, he co-founded Suspect Culture Theatre Co., for whom he wrote Timeless, Mainstream & 8000M. Since 2016, David has been the Artistic Director of The Royal Lyceum Theatre in Edinburgh.