Greta Goiris studied costume design at the Royal Academy of Fine Arts in Antwerp and set design at Institute del Teatre in Barcelona. Her first costumes she designed for Jaques Delcuvellerie in Brussels and Avignon, amongst which were ‘La Grande Imprecation Devant Les Murs De La Ville’ (T. Dorst ), La Mere (B. Brecht), Andromaque (Racine) and Rwanda-1994.

From 2001 onward she collaborated with Johan Simons on numerous (music-)theatre productions, which amongst others included the Leenane Trilogy (M.Mc Donagh) for ZT Hollandia; Sentimenti, Das Leben ein Traum (Calderon), Vergessene Strasse (Louis-Paul Boon) for the Ruhrtriennale; Die Perser (Aischylos) for Münchner Kammerspiele; Die Neger (Jean Genet) for Wiener Festwochen (2014); and Radetzkymarsch (Joseph Roth) for the Burgtheater (2017). Also with Simons she designed the costumes for the operas Fidelio (Beethoven) for Opera de la Bastille (2008) in Paris, Herzog Blaubarts Burg (Bela Bartok) for the Salzburger Festspiele (2008), and Alceste (Gluck) for the Ruhrtriennale (August 2016). July 2016 Greta designed the costumes for Les Indes Galantes directed by Sidi Larbi Cherkaoui for the Bayerische Staatsoper. Greta also collaborated with Pierre Audi, Ivo Van Hove, Karin Beyer, Josse De Pauw and Peter Verhelst.

Die Zauberflöte (De Munt, 2005) would be the start of a long collaboration with William Kentridge. Operas The Nose; (Metropolitan Opera, 2010), Lulu (DNO, Metropolitan Opera, 2015, ENO 2016), Wozzeck (Salzburger Festspiele, 2017) and installations and music theatre productions Refuse the Hour; (Holland Festival/Festival d’Avignon), The Refusal of Time; (Documenta Kassel), Winterreise; (Wiener Festwochen), Paper Music; (Firenze), More Sweetly Play the Dance (Amsterdam) and O Sentimental Machine (Istanbul Biennal) all follow.