Professor Horvath has been clinical director at SEALS Department of Clinical Chemistry, at the Prince of Wales Hospital in Sydney since December 2009. She is Honorary Professor at the University of Sydney and a Conjoint Professor in the School of Medical Sciences of the University of New South Wales. She spent altogether 8 years in Britain, first as a scientist in London (1988-1990), later as a chemical pathologist trainee in Sheffield (1993-1994), and subsequently as lecturer in clinical biochemistry at Oxford University (1995-1998). She headed the Department of Laboratory Medicine at the University of Szeged in Hungary for 11 years (1998-2009) before moving to Australia.
She has been a member (1999-2002) and between 2003-2008 the chair of the Committee on Evidence-based Laboratory Medicine of the International Federation of Clinical Chemistry and Laboratory Medicine. In 2005-2007 she acted as Secretary of the European Communities Confederation of Clinical Chemistry and Laboratory Medicine (EC4). She was the president of the Hungarian Society of Laboratory Medicine between 2005-2008. She was president of the European Federation of Clinical Chemistry and Laboratory Medicine (2009-2011) and currently she serves as immediate past president of EFCC.
Her main scientific interest is evidence-based laboratory medicine. Her hobbies are canoeing, gardening, hiking and photography.