Her primary research interests are the late stages of stellar evolution, mass-loss and variability. She also works on galactic structure, near-by galaxies and the cosmic distance scale. She is involved in astronomy education, astronomy for development, and international coordination and collaboration. She has served as president of the International Astronomical Union’s Division VII (Galactic Systems), is a member of the Academy of Sciences of South Africa, an honorary fellow of the Royal Astronomical Society (UK) and an honorary member and fellow—and former president—of the South African Institute of Physics (SAIP). She is the recipient of the 2018 de Beers Gold Medal of the SAIP and a Doctor of Laws (honoris causa) from Rhodes University in 2020.