From 1992 to 1998 In 1999, she was awarded an
Australian Research Council (ARC) QEII Fellowship and went to Australia, conducting research for four years under this fellowship. Simmons founded
Silicon Quantum Computing, a
Sydney based quantum computing company, in 2017 and is the current CEO. She has held several other positions over the course of her career, including: In 2025 Simmons was elected to the Board of Directors of the Tech Council of Australia.
Achievements Simmons is well-known internationally for creating the field of atomic electronics, that is, building electronic devices at the atomic scale. Her research team at ARC created the first precision single atom
transistor and the narrowest conducting wires in
silicon, among other achievements. and the narrowest conducting doped wires in silicon. ==Publications and other activities==