Chua Sock Koong
Group Chief Executive Officer
Kelly Bayer Rosmarin
Chief Executive Officer, Consumer Australia and Chief Executive Officer, Optus
Chief Executive Officer, Group Enterprise / Country Chief Officer, Singapore
Group Chief Technology Officer
Chief Executive Officer, International
CEO Group Strategy and Business Development / Country Chief Officer Thailand
Lim Cheng Cheng
Group Chief Financial Officer
Group Chief Corporate Officer
Chief Executive Officer, Group Digital Life
Group Chief Human Resources Officer
Yuen Kuan Moon
GCEO-designate / CEO Consumer Singapore / Group Chief Digital Officer
Group Chief Information Officer
Chua Sock Koong
Ms Chua Sock Koong, 63, was appointed Group CEO on 1 April 2007. She has overall responsibility for the Group’s businesses.
Sock Koong joined Singtel in June 1989 as Treasurer before becoming CFO in April 1999. She held the positions of Group CFO and CEO, International from February 2006 to 12 October 2006, when she was appointed Deputy Group CEO.
Sock Koong sits on the boards of Bharti Airtel Limited, Bharti Telecom Limited, the Defence Science and Technology Agency, Cap Vista Pte Ltd and key subsidiaries of the Singtel Group. She is also Deputy Chair of the GSMA Board. Sock Koong is the Deputy Chairman of the Public Service Commission and a member of Singapore’s Council of Presidential Advisers and the Research, Innovation and Enterprise Council.
Sock Koong was awarded the Public Service Star at the Singapore National Day Awards 2019 and the Medal of Commendation (Gold) at the NTUC May Day Awards 2016. Sock Koong holds a Bachelor of Accountancy (First Class Honours) from the University of Singapore. She is a Fellow Member of the Institute of Singapore Chartered Accountants and a CFA charterholder.
Kelly Bayer Rosmarin
Ms Kelly Bayer Rosmarin, 44, was appointed as CEO for both Consumer Australia and Optus on 1 April 2020. She joined Optus on 1 March 2019, as Deputy CEO, and was named CEO-designate on 5 December 2019.
Prior to joining Optus, Kelly spent 14 years of service with Commonwealth Bank of Australia (CBA) where she held several senior positions and varied portfolios. Kelly’s last appointment was the Group Executive of Institutional Banking and Markets at CBA. She also spent time as a management consultant, in an enterprise software company and at a venture-backed high-growth software start-up.
Kelly is recognised for leveraging technology, data and analytics to develop leading customer services and experience. Kelly was named in the Top 10 Businesswomen in Australia and the Top 25 Women in Asia Pacific Finance and holds a variety of board and advisory responsibilities.
Kelly holds a Bachelor’s Degree in Industrial Engineering & Engineering Management and a Master of Science in Management Science & Industrial Engineering from Stanford University, USA.
Mr Bill Chang, 53, was appointed CEO, Group Enterprise on 16 July 2012. He leads the infocomm and technology (ICT) team, providing solutions to enterprise customers. He also assumed the role of Country Chief Officer Singapore on 1 October 2014, as principal liaison with local and regulatory bodies.
Bill joined Singtel in November 2005 as Executive Vice President of Corporate Business and subsequently as Managing Director, Business Group.
Bill is the Chairman of the Singapore Polytechnic Board of Governors and co-chaired the Future Jobs and Skills Sub-committee of the Committee on the Future Economy of Singapore. He is a member of the Australian Institute of Company Directors’ International Advisory Technology Governance and Innovations Panel, and the board of Urban Redevelopment Authority of Singapore.
Bill has won multiple recognitions including the Public Service Star in conjunction with National Day Honours, the Singapore Computer Society’s IT Leader of the Year award in 2017, and the honorary Fellow of the Society in 2014.
Bill graduated with a Bachelor of Engineering (Honours) in Electrical and Computer Systems Engineering from Monash University, Australia and attended the Harvard Business School’s Advanced Management Program.
Mr Mark Chong, 56, was appointed Group Chief Technology Officer on 1 April 2017. He leads the Group’s technology strategy and innovations in the transformation of its networks and businesses across Singapore and Australia. Prior to his appointment, Mark was CEO, International from January 2013 to March 2017.
Mark joined Singtel in 1997 and has held various executive positions in the company including the roles of EVP (Networks) in Singapore and Chief Operating Officer of Advanced Info Service Public Company Limited (AIS), Singtel’s associate in Thailand.
Mark has represented Singtel on the boards of public listed companies such as Globe Telecom, Bharti Infratel, CS Loxinfo PCL and other non-listed companies such as OpenNet. He is currently Chairman of Bridge Mobile Alliance and an Authority member of the Civil Aviation Authority of Singapore.
He graduated with a Bachelor of Electronics Engineering and Master in Research in Electronic Systems from ENSERG, Grenoble, France, on a Singapore Government scholarship. Mark obtained his MBA from the National University of Singapore. He is a Senior Fellow with the Singapore Computer Society.
Mr Arthur Lang, 48, is CEO, International having joined Singtel in January 2017. His main responsibilities are to oversee the growth of the Group’s regional associates across Africa, India, Indonesia, the Philippines and Thailand, strengthen their relationships with overseas partners, and drive regional initiatives, such as the regional mobile financial and gaming businesses, for scale and synergies.
Prior to joining Singtel, Arthur was Group Chief Financial Officer of CapitaLand Limited, where he also ran CapitaLand’s real estate fund management business. Prior to CapitaLand, Arthur was at Morgan Stanley where he was Co-head of the Southeast Asia investment banking division and Chief Operating Officer of the Asia Pacific investment banking division.
Arthur is a board member of Airtel Africa, Globe Telecom, Bharti Infratel Limited, NetLink NBN Trust, the Land Transport Authority of Singapore, the National Kidney Foundation and the Straits Times School Pocket Money Fund. He also sits on the Advisory Board of the Lee Kong Chian School of Business, SMU. In 2018, Arthur was awarded the Public Service Medal for his contributions.
Arthur has an MBA from the Harvard Business School and a BA in Economics (magna cum laude) from Harvard University.
Mr Allen Lew, 65, was appointed CEO, Group Strategy and Business Development and Country Chief Officer Thailand on 1 April 2020.
Prior to that, Allen was CEO for Consumer Australia and Optus where he led Optus to be the go-to operator in Australia for great connectivity, innovative services and exciting content. Before his posting to Australia, Allen was Country Chief Officer in Singapore and CEO, Group Digital Life.
Allen began his career with Singtel in November 1980 and has served in various senior management roles, both in Singapore and overseas. His first overseas posting was to Advanced Info Service Public Company Limited (AIS), Singtel’s regional associate where he was Chief Operating Officer for three years before his posting to Optus in late 2001, as Managing Director of Optus Mobile. He was later appointed Managing Director of Optus Consumer Business. He returned to Singapore as CEO Singapore in 2006.
Allen is a board member of AIS and Chairman of the AIS Executive Committee.
Allen holds a Bachelor of Electrical Engineering from the University of Western Australia under a Colombo Plan Scholarship and a Master of Science (Management) from the Massachusetts Institute of Technology.
Lim Cheng Cheng
Ms Lim Cheng Cheng, 48, is Group Chief Financial Officer. She is responsible for the Singtel Group’s finance-related functions including tax, treasury and investor relations.
Cheng Cheng has over 25 years of experience in finance and mergers and acquisitions. She joined Singtel in 2012 as Vice President, Group Strategic Investment and was appointed Deputy Group Chief Financial Officer on 1 October 2014 and Group Chief Financial Officer on April 10, 2015.
Before joining Singtel, Cheng Cheng was Executive Vice President and Chief Financial Officer at SMRT Corporation. She also worked at Singapore Power for 10 years in various corporate planning, investments and finance roles, the last being Head and Vice President (Financial Planning and Analysis).
Cheng Cheng is a non-executive, non-independent Director at SingPost and was the winner of the Best CFO (big cap) title at the 2018 Singapore Corporate Awards.
Cheng Cheng holds an MBA from the University of Chicago Booth School Of Business and a Bachelor of Accountancy from Nanyang Technological University. She is a Chartered Accountant (Singapore) of the Institute of Singapore Chartered Accountants.
Ms Jeann Low, 59, was appointed Group Chief Corporate Officer on 10 April 2015. She is responsible for the Group’s corporate functions including mergers and acquisitions, corporate communications, legal, regulatory, risk management and procurement.
Prior to this role, she was Group Chief Financial Officer for seven years. Jeann joined Singtel on 12 October 1998 as Group Financial Controller and has held several management roles including Executive Vice President of Strategic Investments and CFO of Optus.
Jeann is a board member of the Governing Board of the Lee Kong Chian School of Medicine. She is also a Director of Advanced Info Service Public Company Limited (AIS) and Intouch Holdings Public Company Limited.
Jeann holds an Honours Degree in Accountancy from the National University of Singapore and is a Fellow Member of the Institute of Singapore Chartered Accountants.
Mr Samba Natarajan, 54, is CEO, Group Digital Life. He joined Singtel in May 2014 as Managing Director of Digital Enterprise, leading a team focused on identifying and executing on growth opportunities from emerging technology trends.
Samba has more than 25 years of corporate and consulting experience across a wide range of senior roles in the areas of strategy, business development and finance. He worked for Citibank from 1988 to 1997 and McKinsey & Company from 1999 to 2014. In his last role at McKinsey, he was the Leader of Southeast Asia Technology, Media & Telecommunications practice.
Samba serves on the Board of Directors of Globe Telecom in the Philippines. He is also a member of the board of the Singapore American School.
Samba holds a Bachelor of Engineering degree in Electrical Engineering with distinction from the Birla Institute of Technology and Science in Pilani, India; a Post Graduate Diploma in Management from the Indian Institute of Management in Ahmedabad, India, and an MBA from the Wharton School, University of Pennsylvania, USA where he was a Ford Fellow and a Palmer Scholar.
Ms Aileen Tan, 53, Group Chief HR Officer, is responsible for Singtel Group's human resources development and leads its corporate sustainability function.
Aileen joined Singtel in June 2008 as Group Director, HR. Prior to that, she was Group General Manager, HR at WBL Corporation Limited and VP, Centres of Excellence with Abacus International Pte Ltd.
She co-chairs the Ministry of Manpower’s (MOM) HR Industry Transformation Advisory Panel and is a member of Minstry of Education's Institute for Adult Learning Council, Ministry of Finance's VITAL's Advisory Panel and MOM's Workplace Safety & Health Council. She is also a member of the Institute for Human Resource Professionals (IHRP) Board, Singapore University of Social Sciences Board of Trustees, Home Nursing Foundation Board and Health Science Authority Board.
Aileen graduated with a Bachelor of Arts from the National University of Singapore. She holds a Master of Science in Organisational Behaviour from the California School of Professional Psychology, Alliant International University, US. She is a pioneer IHRP Master Professional, conferred by the IHRP in recognition of her being a role model for the HR profession. She received the Public Service Medal in 2018 for significant contributions to Singapore's human resources sectors.
Yuen Kuan Moon
Mr Yuen Kuan Moon, 53, was appointed CEO, Consumer Singapore in June 2012. He leads the Singapore consumer business to deliver an integrated suite of mobile, broadband and TV services. Moon is concurrently responsible for driving the Group’s digital transformation as Group Chief Digital Officer, a role that was created in 2018 to unlock digital growth opportunities in an era of disruption. Moon was named GCEO-designate on 1 October 2020.
Since joining Singtel in 1993, Moon has held several leadership roles in Marketing, Business Development and Sales, including VP of Regional Operations and EVP of Digital Consumer. In 2003, Moon was posted to Telkomsel as General Manager for Product Development and appointed Director of Commerce from 2005 to 2007.
Moon has served on the Board of Comissioners in Telkomsel since 2009. He was appointed to the Board of SkillsFuture Singapore in 2016, the Board of Advisors of the Institute of Service Excellence at SMU and the Digital Readiness Council Steering Committee in 2018 and the SIM Governing Council in 2019.
Moon holds a First Class Honours degree in Engineering from the University of Western Australia and a Master of Science in Management from Stanford University.
Mr William Woo, 56, was appointed Group Chief Information Officer from 1 August 2017. William was the Managing Director of Enterprise Data and Managed Services and Managing Director of Cyber Security at Group Enterprise.
He joined Singtel in May 2011 from Xchanging PLC, where he was Managing Director for the Southeast Asia region. Prior to that, William spent 20 years at EDS and had held various senior management roles which included Managing Director of Southeast Asia & India and Vice President, Global Service Delivery of Asia, responsible for leading the Information Technology Outsourcing, Business Process Outsourcing and Applications service delivery across the Asia region. He started his career with the National Computer Board.
William graduated with a Bachelor of Applied Science in Computing (Distinction) from the Queensland University of Technology, Australia, and holds an Executive MBA from the National University of Singapore.