Warren Siebrits started his art career working at Stephan Welz and Company, Rosebank in 1988. He worked as an assistant to Mr. Stephan Welz in the Painting and Prints department as well as assisting with Book Auction cataloguing. He then went on to work for Trent Read at the newly opened Everard Read Contemporary in Rosebank in 1992, until the gallery’s closure in 1995.
In 1996 Siebrits established Metroplex, a gallery operating from two shop windows in Rosebank. Exhibitions included Wopko Jensma, Robert Ryman, Andy Warhol, Neil Goedhals, Kendell Geers and Jeff Mills. During this time, Warren also worked as an art adviser for numerous Corporate and Government clients. These included the Gauteng Legislature, BHP Billiton, Vodacom, MTN and the Sandton Convention Centre.
Shortly after completing the SCC collection he opened his own gallery, Warren Siebrits Modern and Contemporary Art in August 2002. In the follwing seven years, his gallery published 33 fully illustrated and researched catalogues, which provided context to each work and documented the exhibitions for future reference. In 2007 he curated Willem Boshoff’s Word Forms and Language Shapes, a mid-career retrospective at the Standard Bank Gallery and in 2016 the seminal exhibition, Walter Battiss “I invented myself” at the Wits Art Museum. He is currently working on William Kentridge’s prints and multiples catalogue raisonné.