Datuk Shireen is a seasoned investment professional starting her career in 1988 with Arab Malaysian Merchant Bank. In 1992, she joined the AIG Group until 2004. She was the CEO of AIG Investment Corporation (Malaysia) and was managing Emerging Asia equities. 

Datuk Shireen founded Corston-Smith Asset Management in 2004, an E.S.G. Asset management company that was an early signatory to the UNPRI in 2008.

Datuk Shireen has served on various PLCs which include a port as well as a local bank. She has also served on a foreign bank board. She was appointed as a Director of FELDA on 26 July 2018. Following her appointment, she was then appointed as Chairman of FELDA's Investment Committee and Chairman of FELDA's Risk and Governance Committee until 25 July 2022. On 1 March 2019, she was appointed as the Non-Executive Chairman of Bursa until 30 April 2020.

She also served on the Economic Action Council from February 2019 to March 2020. In recognition, Asian Investor in 2011 listed Datuk Shireen as one of The Most Influential Women in Asia-Pacific's Asset Management Industry and Forbes Asia in 2014 listed Datuk Shireen as Asia's 50 Power Businesswomen.

1. Media Prima Berhad

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