Cynthia worked for Bankers Trust and Macquarie Bank in Corporate Advisory. Cynthia began her legal career at Allens in 2001, where she was articled to Professor Bob Baxt AO. In 2005, Cynthia commenced practice at the Sydney Bar. Since 2013, Cynthia has been recognised as a Preeminent Junior Counsel in Doyle's Guide to Leading Intellectual Property Barristers - Sydney and was described by Doyles, in 2010, as “professional and always well prepared” and “a standout on patent matters”. Cynthia regularly appears unled and against Senior Counsel. As well as appearing in the High Court, the Federal Court and the Patent Office, Cynthia appears in commercial matters in the Commercial List of the Supreme Court of NSW.