Thayaparan has over 35 years of experience in providing audit and business advisory services to clients across a wide range of industries. His portfolio includes major public listed companies in power, telecommunications, automotive, property development, plantation, manufacturing, and trading sectors.

He has also led cross-border assignments. In addition to statutory audits, Thayparan has overseen financial due diligences, mergers & acquisitions, initial public offerings, finance function effectiveness reviews, and other advisory work.

Thayaparan joined Price Waterhouse (now PricewaterhouseCoopers, PwC) in Kuala Lumpur in 1983. He was a Partner in the Assurance Services of PwC Malaysia from 1994 until his retirement as Senior Partner in 2015.

Thayaparan is a Fellow of the Institute of Chartered Accountants in England & Wales. He is also a member of the Malaysian Institute of Certified Public Accountants and the Malaysian Institute of Accountants.