Chief Justice Warren was appointed as Chief Justice of the Supreme Court of Victoria in November 2003. She commenced her legal career in the Victorian Public Service and was admitted to practice in 1975. She was later appointed an assistant chief parliamentary counsel. Her Honour signed the Roll of the Victorian Bar in 1985 and practised predominantly in the areas of administrative law, commercial law and town planning. In 1997 she was appointed Queen’s Counsel. In 1998 she was appointed to the Supreme Court of Victoria and presided in all jurisdictions.
From 1999 to 2002 she was a Commercial List judge sitting on cases such as Ashton Millson Investments Ltd v Colonial Ltd (2001) 162 FLR 145 (‘Computershare’), Capricorn Diamonds Investments v Catto (2002) 5 VR 61 and Austrim Nylex Ltd v Kroll (2002) 170 FLR 265. Her Honour has also presided on numerous commercial cases in the Court of Appeal, for example Elliot v ASIC (2004) 10 VR 369 (‘Water Wheel’).