Glenn has a long held interest in fetal therapy including in-utero surgery and is currently the only specialist in Australia and New Zealand performing fetal surgery for diaphragmatic hernia and spina bifida. He regularly performs surgery for twin-to-twin transfusion syndrome, in-utero blood transfusions and other complex in-utero procedures.

With a particular interest in the prevention of stillbirth, Glenn is involved in research and is a current board member for the International Stillbirth Alliance and leads a Fetal Therapy Special Interest Group through the Perinatal Society of Australia and New Zealand (PSANZ).