Mr. Alex J. Sinaga has been President Commissioner of Telkomsel since January 2015. He is currently also the President Director of PT Telkom Indonesia (Persero) Tbk.

Prior to this, he held various strategic positions within Telkom Group, including as the President Director of Telkomsel (2012-2014), President Director of TelkomMetra, a subsidiary of Telkom as a strategic investment company focusing on information, Media, Edutainment and Services (2007-2012), President Commissioner of PT Sigma Cipta Caraka (Telkomsigma) and Executive General Manager of various divisions in Telkom Indonesia (2002-2005). Aside from Telkom Group, Alex J. Sinaga has also held several prestigious positions, including as the Chairman of Indonesian Telecommunication Association (ATSI) from 2012 to 2014 and Chairman of Board of Trustees of ATSI from 2014 to 2015. 

He holds a degree in Electrical Engineering from the Bandung Institute of Technology (ITB) and a Master degree in Telematics from the University of Surrey, Guildford, United Kingdom.

He was awarded Medal of Honor Satyalancana Pembangunan and Satyalancana Wira Karya in 2014 by the President of the Republic of Indonesia.

Mr. Mohamad Irfan has served as a Commissioner of Telkomsel since July 2018. An executive with more than 14 years of profit-driven marketing and sales experience in various sectors including telecommunications, he is experienced in strategy analysis as well as sales and profit development.

He is presently also a Commissioner at PT Mandala Putera Prima, PT Nurbaitullah Tour & Travel, PT Mirga Metracon and PT Faidhi Systema Solusindo (Fasyndo), where he was actively involved in creating, developing and penetrating new market segments, including winning major tenders.

Over the course of his career he also held positions at  PT Indonesia Comnets Plus (ICON+) as commisioner, PT Mediavision Innovative Technology as the Sales Director and at PT Philips Indonesia as Key Account Manager - Government Segment, Project Coordinator - Government Segment for East Java, Bali, NTB & NTT. At GE Consumer & Industrial - PT GE Lighting Indonesia, he was a Sales Engineer for DKI Jakarta and Sales Engineer for South Sulawesi. Previously he was also a Business Development Officer at PT Phoenix International Indonesia.

He graduated from Hasanuddin University, Makassar in 2001 majoring in Marketing Management, and subsequently earned a Magister of Management degree from the University of Indonesia in 2004, also majoring in Marketing Management.

Mr. Harry M. Zen has been a member of the Board of Commissioner of Telkomsel since August 2016. He has also served as the Chief Financial Officer of PT Telkom Indonesia (Persero) Tbk. since April 2016.

He concurrently serves as President Commissioner of PT Graha Sarana Duta. Prior to this, he held various strategic positions including as President Director of PT Credit Suisse Securities Indonesia (2008-2015), Director of Barclays Capital (2007-2008), Co-Head Investment Banking of PT Bahana Securities (2001-2007) and Assistant Vice President of Citibank - Corporate Banking.

He holds a Bachelor degree in Metallurgical Engineering from the University of Indonesia and a Master of Business Administration in Corporate Finance and Financial Institutions & Market from the State University of New York at Buffalo, USA.

Mr. Paul Dominic O’Sullivan has been a Commissioner of Telkomsel since January 2010. He has also served as Chairman of Optus since October 2014.

He is currently a Board Director of the following: HOOQ Pte Ltd, a JV between Singtel, Warner Bros and Sony Pictures Entertainment; NDIA, The National Disability Insurance Agency, providing support for Australians with disability, their families and carers; and Healthscope, a leading private healthcare operation in Australia. He is also a Board Member of the St George and Sutherland Medical Research Foundation and a Board Member of the Advisory Board of the UNSW Bright Alliance. 

Mr. Paul Dominic O’Sullivan was previously CEO of Singtel Group Consumer from 2012-2014, where he was responsible for the wholly owned operations in Singapore and Australia, as well as Singtel’s investments in Thailand, India, Africa, the Philippines and Indonesia. He was CEO of Optus from September 2004 to March 2012, during which time Optus experienced strong growth including 18 quarters in a row of EBITDA growth and 7 consecutive half-years of mobile revenue share gain. 

He holds a Bachelor (Mod) degree in Economics from Trinity College, University of Dublin and is a graduate of the Advanced Management Program of Harvard University, USA.

Mr. Yose Rizal has been a member of the Board of Commissioner of Telkomsel since May 2017. He is the founder of PoliticaWave.com and also serves as CEO of MediaWave Analytics and MediaWave Interactive since 2010, and Head of Research and Measurement in Indonesia Digital Association since 2014.

Prior to this, he served as Business Director of Snoop Mobile Media (2008 – 2010), Director of Azka Megah Dirgantara (2003 – 2008), and Director of Bandung Information Technology (2000 -2004). He is an extraordinary lecturer and business mentor at Master of Business Administration program, School of Business and Management, Bandung Institute of Technology.

He holds a Bachelor degree in Urban & Regional Planning from Bandung Institute of Technology.

Mr. Yuen Kuan Moon has been on the Board of Commissioners since September 2009. He is currently Singtel’s Chief Executive Officer, Consumer Singapore, since June 2012. He is responsible for leading the Singapore consumer business to deliver a complete and integrated suite of services, including mobile, broadband, TV and fixed line solutions to consumers.

Moon began his career with Singtel in 1993 and therefore has over 20 years of experience in the consumer business, including Marketing, Business Development, Retail and Channel Sales. He has held several leadership roles, including Vice President of Regional Operations and Executive Vice President of Digital Consumer.

Moon was also posted to Telkomsel from 2003 to 2007, where he was appointed Director of Commerce from 2005 to 2007. In October 2016, he was appointed a Member of the SkillsFuture Singapore Board. He is an Engineering graduate with a First Class Honors degree from the University of Western Australia and the holder of a Master of Science degree in Management from Stanford University (Sloan Program) in California, USA.

Mr. Ririek Adriansyah has served as President Director of Telkomsel since January 2015. He is responsible for the overall management of the Company. He has held various strategic positions at PT Telekomunikasi Indonesia (Telkom) and Telkom Group since 1990.

Previous Positions:

• Director of Wholesale & International Service at Telkom (2013-2014)
• Director of Compliance and Risk Management at Telkom (2012-2013)
• President Director at PT Telekomunikasi Indonesia International (Telin) (2011-2012)
• Director of Marketing & Sales at Telin (2010-2011)
• Director of International Carrier & Services at Telin (2008-2010)
• Deputy Executive General Manager of the Infratel Division at Telkom (2004-2008)

He holds a degree in Electrical Engineering from the Bandung Institute of Technology (ITB).

Mr. Heri Supriadi has served as Director of Finance since May 2012. He is responsible for the overall finance and procurement functions.

Previous Positions:

• President Director of PT Telkom Property (2010-2012)
• Vice President of Investor Relations and Corporate Secretary Telkom (2009-2010)
• Vice President of Subsidiary Performance Telkom (2007-2010)
• Assistant Vice President of Subsidiary Performance Telkom (2007)
• Assistant Vice President of Funding and Debt Management Telkom (2006-2007)

Mr. Heri Supriadi graduated with a Bachelor degree in Industrial Engineering from Bandung Institute of Technology and has a Master degree in Business Administration from Saint Mary’s University, Halifax, Canada as well as a Doctoral degree in Business Management from Padjadjaran University, Bandung.

He has attended various executive education programs at Harvard Business School, Kellogg School of Management, Euro Money, and The University of Auckland Business School among others. He is a visiting lecturer at various universities and the author of books on Strategic Management & Research Methodology.

Mr. Bob Apriawan was appointed as Director of Network since May 2017, he is responsible for the overall management and control of network infrastructure.

He is also currently a member of the Board of Commissioner at PT Telkominfra a subsidiary of PT Telekomunikasi Indonesia (Telkom) in infrastructure management service since 2016.

Previous Positions:

• Senior Vice President of Procurement at Telkomsel (2013-2017)
• Vice President of Asset Management at Telkomsel (2012-2013)
• Vice President of Organization and Workforce Management at Telkomsel (2012)
• Vice President of HR System at Telkomsel (2010-2012)
• Vice President of RAE Outside Java Bali at Telkomsel (2008-2010)

Bob graduated from Diponegoro University (Undip) with Bachelor of Electrical Engineering degree, and holds a Master of Science in Operational Telecommunication degree from Coventry University.

Mr. Sukardi Silalahi was appointed as Director of Sales since May 2017, after he served as Director of Network. He joined Telkom in 1991 where he served in a number of senior positions prior to his appointment to the Board of Telkomsel.

Previous Positions:

• Director of Network, Telkomsel (2015-2017)
• Director of Consumer Service at Telkom (2012-2014)
• Executive General Manager of Consumer Service, East Division at Telkom (2011-2012)
• Deputy Executive General Manager of Consumer Service, West Division at Telkom (2010-2011)
• Executive General Manager of Region VI, Kalimantan Division at Telkom (2008-2010)
• Deputy Executive General Manager of the Fixed Wireless Network Division at Telkom (2007-2008)

In 2013 he was appointed as the Community Director of BUMN (State Owned Enterprise) Marketers Club in 2013, and holds a Bachelor degree in Civil Engineering from the Bandung Institute of Technology (ITB) and a Master’s Degree in Business Administration (Cum Laude) from the University of Gadjah Mada (UGM).

He attended the ‘Making Corporate Boards More Effective’ executive program from Harvard Business School, International Business Management Training in Sweden and High Performance Boards Training at IMD in Switzerland.

He was awarded as The Best BUMN on Marketing in 2013 and The Best Service Provider of The Year 2013 in recognition of his milestone achievement in positioning Telkomsel as the operator with best network quality in Indonesia based on Open Signal data for two consecutive years, in 2015 and 2016. He was a recipient of the Satyalancana Pembangunan medal.

Mr. Alistair D. Johnston has served as Director of Marketing since August 2012, following a stint as a Director at Singtel International.

Previous Positions:

• Group Chief Marketing Officer at Augere, Dubai (2010-2012)
• Head of Prepay at Telefonica O2, United Kingdom (2007-2010)
• Head of Prepay Acquisition and Retention at Orange UK (2004-2007)
• Head of Commercial at Virgin Mobile (2000-2003)
• VP Telecommunications at Virgin (Asia) Management Ltd (2000)

He holds a degree in Modern History from Oxford University, United Kingdom.

Mr. Montgomery A. Hong has served as Director of IT since January 2017. He has over 31 years of experience in the telecommunications industry specializing in large-scale Business and IT Transformation programs.

Previous Positions:

• Regional Chief Information Officer (CIO), International Group at Singtel (2016-2017)
• Chief Transformation Officer at Zain Saudi Arabia (2014-2016)
• Managing Director Communications, Media & Technology at Accenture (1986-2013)

He attended Willamette University in Salem, Oregon, USA, and holds Bachelor of Arts and Master of Management degrees. He previously served on the Board of Directors for the TM Forum

Mr. Edward Ying Siew Heng has served as Director of Planning and Transformation since May 2012. He is now responsible for leading the Digital Services as well as developing Corporate Strategy and Transformation.

Previous Positions:

• Chairman of Metraplasa, a joint venture company between PT Telekomunikasi Indonesia and eBay (2013)
• Director of Commerce (2011-2012)
• Chief Multimedia Group at Singtel (2008-2011)
• COO of Maxis Communications, Malaysia’s largest mobile operator (2003-2008)
• Chief Operating Advisor and a member of the Board of Globe Telecom in the Philippines (1996-2003)
• Managing Director at Cambridge Cable Group Pay TV (1995-1996)

He graduated with a degree in Marketing from the Institute of Marketing, United Kingdom and holds a Diploma in Sales and Marketing from the Marketing Institute of Singapore.

He also attended the General Management Program at the National University of Singapore in 1984 and the International Executive Program at INSEAD, Fontainebleau, France, and ‘The Corporate Entrepreneur – Driving Innovation and New Ventures (TCE)’ executive program at Stanford Graduate School of Business in California, USA as well as ‘Leading Business into the Future’ Executive Leadership Program at London Business School, London, United Kingdom.

Mr. Irfan A. Tachrir has served as Director of Human Capital Management since May 2017. He is also currently a member of the Board of Commissioner at PT Graha Sarana Duta (GSD), a subsidiary of PT Telekomunikasi Indonesia (Telkom).

Previous Positions:

• Senior Vice President Corporate Secretary at Telkomsel (2014-2015)
• Vice President Corporate Counsel at Telkomsel (2012-2014)
• Head of Wholesale Management Group at Telkomsel (2012)
• Vice President International Roaming, Synergy & Partnership Management at Telkomsel (2009-2012)
• Vice President Synergy & Partnership at Telkomsel (2008-2009)

He holds a degree in Economic Law and Development from the University of Padjadjaran (Unpad), and has attended various executive education programs, such as Management Program at the Singapore Management University (SMU), and Leadership Course at the University of California, Berkeley.

He was awarded as Indonesia’s Best Corporate Secretary in 2015 by SWA Magazine.