Andrew joined DLA Piper in 1981 and practised as a Corporate lawyer, becoming a partner in 1987. He has held a number of senior leadership positions within the firm, including Global Co-Chairman, Head of Corporate, Managing Director of the EMEA region, UK Managing Partner, Australian Managing Partner, Chief Operating Officer (for the firm's non-US operations) and Managing Director, Developing Markets (with responsibility for a number of regions, including the Nordics, the Middle East, Africa and India).

Between 2018 and 2022, Andrew served as Senior Partner of DLA Piper International.