Tadej Zemljič graduated from the Veterinary Faculty Ljubljana in 1996. Between 2008 and 2011 he followed the residency training program at the Veterinary Faculty Zurich, Veterinary College Columbus Ohio and private practice in Chemnitz in Germany. In 2012 he passed the ECVO Certifying Examination. For next 8 years he had been performing ophthalmological consultations at several veterinary clinics in Slovenia. In 2020 he established ophthalmology practice in Ljubljana.