Born in Jakarta, October 27, 1963, Justarina Sinta Marisi Naiborhu earned Bachelor Degree from Institut Pertanian Bogor, Master in International Securities, Investment and Banking from Reading University, UK and Master Degree of Management from Universitas Indonesia.

Previously, She was assigned as served as the President Director of PT CIMBPrincipal Asset Management (2008-2011). Director of PT CIMB-GK Securities Indonesia (2003- 2008), Vice President Institutional Business & Advisory PT Kuo Capital Raharja (2001- 2003), Institutional Portfolio Manager, PT Danareksa Investment Management (1999-2001) and Research & Development Analyst, and as Assistant to the President Director of PT Bursa Efek Jakarta (1992-1997). She was appointed for the first time as the Company’s President Director on May 5, 2011 under Deed No. 88 dated May 5, 2011 made before Jimmy Tanal, SH, substitute of Hasbullah Abdul Rasyid, SH, M.Kn., Notary in South Jakarta.

On June 15, 2017, Justarina Naiborhu was appointed as Commissioner of PT Trisensa Mineral Utama under Deed No. 125 dated June 15, 2017 made before Notary Hasbullah Abdul Rasyid, SH, M.Kn., Notary in South Jakarta. She was also appointed as Director of PT Toba Sejahtra on November 1, 2016 according to Deed No. 2 dated November 1, 2016 made before Notary Hasbullah Abdul Rasyid, SH,M.Kn. in South Jakarta. Pursuant to Deed No. 87 dated May 26, 2017 made before Notary Aryanti Artisari, SH., M.Kn, Notary in South Jakarta, She was re-appointed as President Director of the Company effective since appointment date for the second term. She has no affiliation with other Board of Commissioners and Board of Directors members.

Born in Boston – Unites States on May 17, 1979, Pandu Patria Sjahrir earned BA Degree from the University of Chicago, United States and Master of Business Administration from Stanford Graduate School of Business, United States.Prior to joining PT Toba Bara Sejahtra Tbk, He served as a Senior Analyst with specialization in the energy and mining sectors in Matlin  Patterson from 2007 to 2010, as Principal at Byun & Co, Alternative Energy Fund Asia (2002-2005) and as an Analyst at Lehman Brothers (2001-2002).

He was first appointed as a Director of the Company since October 1, 2010 based on the Deed No. 1 dated October 1, 2010, made before Jimmy Tanal, SH, substitute of Hasbullah Abdul Rasyid SH, M.Kn., Notary in South Jakarta. He is appointed as Director of PT Admitra Baratama Nusantara under Deed No. 6 dated June 3, 2013 made before Notary Jimmy Tanal, SH, M.Kn., Substitute Notary of Habullah Abdul Rasyid, SH, M.Kn, Notary in Jakarta.

Pursuant to Deed No. 39 dated April 18, 2017 made before Substitute Notary of Nike Hutami, SH, M.Kn., the substitute of Angela Meilany Basiroen, SH, Notary in Jakarta, He is reappointed as Director of PT Adimitra Baratama Nusantra for the second terms. In 2014, he named the “Asian Society Young Leaders Award”, as an award for young leaders under the age of 40 by the Asia Society.

Pandu P. Sjahrir was also elected as the Chairman of the Indonesian Coal Mining Association (ICMA) in 2015 for the leadership until 2018 period. Based on Deed No. 87 dated May 26, 2017 made before Notary Aryanti Artisari, SH, M.Kn, Notary in South Jakarta, He was reappointed as Director effective since appointment date for the second terms. He has no affiliation with other Board of Commissioners and Board of Directors.

Born in Jakarta on August 9, 1976, Dicky Yordan earned Bachelor of Science in Civil and Environmental Engineering from University of Michigan, Ann Abor, USA in 198 and Master of Science in Financial Engineering from Columbia University, New York, USA in 2002.

He started hsic areer in 1998 – 2000 at PAC Project Advisor, Ann Arbor, MI, USA as Senior Consultant. In 2002-2003 he was assigned as at Byun & Co, Singapura and Associate at PT Anugra Capital Indonesia in 2003-2005. 2005-2006 He acted as Associate at Investment Banking Division, Merrill Lynch, Jakarta, Indonesia. In 2006, He was appointed as Vice President Corporate Coverage, Deutsche Bank, Indonesia and promoted as Director in 2009, Co-Head Global Capital Market, Deutsche Bank, Indonesia and Singapore. In 2011, he was assigned as Managing Director, Joint Head Investment Banking and Financing, Nomura Singapore Limited, Singapore. He is appointed as  Managing Partner, Lynx Asia Partners, Singapore since 2014 until now.

He is first appointed as Director since May 26, 2017 under Deed No. 87 dated May 26, 2017 made before Notary Aryanti Artisari, SH., M.Kn, Notary in South Jakarta. This term is his first terms as Director. Based on Deed No. 39 dated April 18, 2017 made before Substitute Notary Nike Hutami, SH., M.Kn, substitute of Angela Meilany Basiroen, SH, Notary in Jakarta, he was appointed as President Commissioner of PT Adimitra Baratama Nusantara.

He has no affiliation with other members of Board of Directors and Board of Commissioners.

Born in Jakarta on March 26, 1969, Alvin Sunanda got his BSc – Accounting & Finance from Philippines Christian University, Manila, Philippines. Prior to joining the Company, he served as Assistant Manager of Corporate Finance at PT Daiwa Indonesia Securities since 1994 until 1995, as Strategic Planning Manager at PT Pepsi Cola Indobeverages from 1996 to 1998.

From 1999 to 2000, He was appointed as Corporate Finance Manager & Corporate Secretary at PT British American Tobacco Tbk. From 2000 to 2005 he served as Finance Director at PT KhasanahTimur Indonesia and as Director at PT Bramadi Capital Asia from 2005 to 2007. From 2008 to 2010 he served as Finance Director at PT Interex Sacra Raya/PT Tunas Muda Jaya and since 2010 to 2016.

He serves as Finance director at PT Indomining, one of the subsidiaries of PT Toba Bara Sejahtra Tbk. In 2015, he was appointed as Chairman II of Government Relations Division, Indonesian Coal Mining Association (APBI) for the 2015 – 2018 period. He was first appointed as Independent Director of PT Toba Bara Sejahtra Tbk since 31 October 2016 based on the Deed No. 47 dated 31 October 2016 made before Aryanti Artisari, SH,M. Kn., Notary in South Jakarta. He has no affiliations with other members of the Board of Directors, Board of Commissioners, and shareholders.

Born in Jakarta, 29 July 1974, Teguh Alamsyah earned Bachelor of Mining Engineering, from Institute Technology Bandung in 1998.

He started his career in PT Kaltim Prima Coal since 1998 – 2007 with the latest position as Production Superintendent. In 2007 – 2008, he seves as Coordinator Engineering in PT Bukit Makmur Mandiri Utama. In 2008 – 2012 he joined PT Servo Mining Contractor, Servo Buana Resources Group as Director of Operation. In 2012 – 2013 he serves as General Manager of PT Prima Multi Trada. In 2013 – 2014 he serves as General Manager of PT Indomining, a subsidiary of PT Toba Bara Sejahtra Tbk and in 2014 he was transferred to PT Trisensa Mineral Utama, also a subsidiary of PT Toba Bara Sejahtra Tbk as a Director of Operation.

Under Deed No. 33 dated 15 May 2019, he was appointed as Director of PT Toba Bara Sejahtra Tbk. He has no affiliation with other members of Board of Directors and Board of Commissioners and shareholders.