Earlier, he was Head of Group Human Resources and Administration for Bursa Malaysia Bhd. There, Tajuddin facilitated the development of KPIs for the Group and led the HR portion of the ‘Demutualize exercise’ that involved retiring the defined benefits retirement program and a total change in grading, titling and benefits offerings.

Tajuddin previously held several progressive roles with Motorola Electronics in Singapore, where in his last role was HR Director, Semiconductor Products Sector, Asia, among his other achievements, he led the integration of two acquisitions in Asia without impacting business operations, managed the setup of HR function for MOS17 (a wafer production operation) startup and BAT3 (semiconductor assembly and testing) transfer to Xiqing, China, a US$1+ billion investment that included setting up a fully operational site from scratch, establishing functional HR roles, hiring and settling of expatriates, and the overseas training of close to 300 Chinese engineers in the US. He also was responsible for developing a business intelligence database outlining all semiconductor design centers in Asia including their sizes, activities and in-country government incentives, as well as starting the first operational Rewards Organization as a Shared Service function in Asia. Tajuddin also helped develop and rolled out an employee ranking tool currently used globally.

Tajuddin holds an MA in Human Resources (Training & Development) from the Asia Pacific International University. He formerly sat on several boards, including Perusahaan Otomobil Nasional Berhad, Proton Edar Sdn Bhd, Proton Marketing Sdn Bhd, Proton Tanjung Malim Sdn Bhd, Yayasan Proton, Nomination and Remuneration Committee of Proton Holdings Berhad.