[1] His first job was as a computer programmer and systems analyst, but, while working, he enrolled in a Bachelor of Laws by correspondence at the University of South Africa.
[1] Professor John Dugard recruited Mureinik to the Wits Law School's staff as a lecturer in February 1978, immediately after his graduation.
He taught there for the rest of his life, though he moved briefly to England in 1980 to complete a BCL at Balliol College, Oxford, funded by a British Council Scholarship.
[1][2] In addition, he represented Wits at the Judicial Service Commission from 1994 onwards and wrote a fortnightly legal column in the Weekly Mail from 1995 to 1996.
[1][4] Mureinik's most notable work was a 1994 article in the South African Journal on Human Rights, in which he introduced the concept of a "culture of justification" as the foundation of post-apartheid democracy and rule of law.