Van der Walt studied at Stellenbosh University and resided at Wilgenhof and made his debut as Jaquino in Beethoven's Fidelio at the Cape Town Opera before he had graduated.
[citation needed] His first formal engagement took him to Gelsenkirchen's Musiktheater im Revier, then to the Staatsoper Stuttgart and Zurich Opera.
He was invited to perform at the Royal Opera House in London in 1985 and there made his debut as Almaviva in Rossini's The Barber of Seville.
On video, he can be seen in Handel's Semele as Jupiter, singing "Where'er you walk"; in Donizetti's Linda di Chamounix with Edita Gruberová; and in La belle Hélène.
Deon van der Walt died at 47 at his family's vineyard in South Africa, shot by his father, who then committed suicide.