Mr Sim began his career with a public accounting firm and qualified as a Chartered Accountant in 1981. He joined IBM Malaysia where, over a period of 31 years, he held various senior local and regional leadership positions in the areas of financial planning, pricing, treasury operations, real estate strategy, taxation, legal, business controls, business practices, joint venture evaluation and formation, leasing operations, accounting, sales and credit control.

Post retirement in 2015, he was the Senior Advisor of Business Process and Internal Audit at a prominent local private equity company, Creador Sdn Bhd from May 2016 to April 2022.

1. Mesiniaga Berhad
2. Hong Leong Assurance Berhad

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