Garth joined Maple-Brown Abbott in 1997. He was appointed as Managing Director and Chief Investment Officer in July 2009, a position he held for over ten years until October 2019 when he stepped down from the Managing Director role. Garth continues in his role as the Chief Investment Officer and his responsibilities include equities analysis and portfolio management. He was an executive director from July 1999 to March 2020. Before joining Maple-Brown Abbott Garth was Director and Portfolio Manager at Allan Gray Ltd (South Africa).