Dr Nicky Oosthuizen is a Chemical Pathologist in private practice with PathCare Laboratory since 2016. She qualified as a specialist in 2000 and held a joint appointment as consultant and lecturer in the National Health Laboratory Service and University of Pretoria for sixteen years, five of them as acting head of department of Chemical Pathology. During this time, she was intimately involved in teaching, training and assessment of undergraduate and postgraduate students in the Faculty of Health Sciences.

She has participated in national and international congresses and has a number of publications in peer-reviewed medical journals. Since January 2025 her practice has focussed on autoimmune serology including reporting of HEp-2 indirect immunofluorescence assay patterns.