Datuk Ali was appointed to the Board of Glomac Berhad on 20 February 2009. He is a Fellow of the Institute of Chartered Accountants in England and Wales (ICAEW), member of the Malaysian Institute of Certified Public Accountants and the Malaysian Institute of Accountants. He is also the Honorary Advisor to ICAEW Malaysia, Honorary Fellow of the Institute of Chartered Secretaries & Administrators, United Kingdom and the Malaysian Institute of Directors.
Datuk Ali is currently the chairman of Jobstreet Corporation Berhad and Enra Group Berhad,. He is a board member of Citibank Berhad, Labuan Financial Services Authority, Labuan IBFC and Ekuiti Nasional Berhad. He also sits on the boards of Landskap Malaysia, Tropical Rainforest Conservation & Research Centre Berhad. He was the Chairman of Privasia Technology Berhad up until his retirement in June 2018
Datuk Ali was the Chairman of the Securities Commission of Malaysia from 1 March 1999 to 29 February 2004. During his tenure, he was instrumental to the launch of the Capital Market Masterplan and chairing the Capital Market Advisory Council. He was also a member of a number of national level committees namely the Foreign Investment Committee, Oversight Committee of Danaharta and Finance Committee on Corporate Governance.
On the international front, he was a member of the executive committee of the International Organisation of Securities Commissions (IOSCO) and chairman of its Asia-Pacific Regional Committee and the Islamic Capital Market Working Group. He was also the advisor to the Sri Lanka Securities & Exchange Commission.
Earlier in his career, Datuk Ali was the Executive Chairman and Partner of Ernst & Young and its related firms. He was the Past President of the MICPA, chairing its Executive Committee and Insolvency Practices Committee, and co-chairing the Company Law Forum. He was appointed as an Adjunct Professor in the Accounting and Business Faculty, University of Malaya in 2008, retiring in August 2011. He was then appointed to the Advisory Board of the same faculty.
Datuk Ali was bestowed with the “Lifetime Achievement Award” by MICPA and the "President’s Award” by ICAEW Kuala Lumpur City Chapter.