Errol Stein graduated in dentistry at the University of the Witwatersrand where he was the Gold Medalist of his year. He practised in London before returning to Johannesburg where, after five years in general practice, he went on to study for his Higher Diploma in Dentistry and the Diploma in Orthodontics at Wits. His subsequent qualifications were a Masters degree in Dentistry (Orthodontics) and a Fellowship in Dentistry (Orthodontics) at the College of Medicine of South Africa.
Errol Stein is a Professor in the Department of Orthodontics at Wits University. He has lectured extensively both locally and internationally, and is the author of many scientific papers in the specialist literature. He is an international member of the American Association of Orthodontists, and also the World Federation of Orthodontics. He is in practice as a specialist orthodontist in Johannesburg.