Prior to his involvement with the Sontonga Quartet, Xandi freelanced with various Cape Town orchestras. He has held the position of principal viola in the World Youth Symphony Orchestra at the Interlochen Arts Camp in Michigan, USA, as well as being principal viola of the South African National Youth Orchestra for a number of years. Xandi has had masterclasses with Wolfram Christ, Lawrence Dutton, Isabel Charisius, Alberto Lysy and Christopher Rowland, as well as chamber classes with the St. Lawrence String Quartet, Jürgen Kussmaul, Eberhard Feltz, Henk Guittart, Philippe Graffin and Yo-Yo Ma.
More recently, Xandi has performed in Cape Town with London Philharmonic concertmaster Pieter Schoeman and the Cape Philharmonic Orchestra, and in London at the Purcell Room with the electronica artist Mira Calix and Cadogan Hall with the Brodsky Quartet.
Xandi holds a B.Mus in viola performance and a B.Mus (Hons) in conducting, both with distinction, from the University of Cape Town.