The Bachelor of Veterinary Science, University Pretoria, South Africa, 1961. Doctor of Veterinary Science, University Pretoria, South Africa, 1976. Master of Science in Physiology, University Stellenbosch, South Africa, 1980.
State veterinarian, Government of South Africa, Vryburg, Estcourt, Ermelo, 1962-1965; private practice veterinary medicine, in partnershhip, Pretoria, 1966-1974; senior lecturer department surgery Faculty Veterinary Science, U. Pretoria, 1974-1981; associate professor, U. Pretoria, 1982-1989; professor, head section ophthalmology, U. Pretoria, 1990-1997; associate, specialist practice, Pretoria, since 1997. Consultant, surgeon private practitioners in South Africa and abroad, since 1974. Consultant dog breeders associations, South Africa, since 1976.
Member South African Academy of Sciences and Art (branch chairman 1977-1978, national vice chairman medical science 1989-1990), South African Veterinary Association (life).
Son of Paul and Hedwig (Schweika) Tietz. Adopted by foster parents;m. Florence Ada Van Niekerk, July 16, 1966.
Children: Tanya, Léart Siefried, Werner Arthur, Nadine.