Board of Commissioners, Board of Directors


Jonathan Jochanan

Jonathan J DJC_4512-01

An Indonesian Citizen, he has held the position of President Commissioner of PT Wintermar Offshore Marine Tbk since 16 September 2010, and as the Independent Commissioner, he also chairs the Company’s Audit Committee. Prior to the appointment, he was the President Director of Bahana Securities. With more than 30 years’ experience in Investment banking, he has held various as a Directorships in several capital market companies in Indonesia, notably PT Schroders Indonesia (1994)and PT Citicorp Securities Indonesia (1990).He completed his Bachelor of Economics degree from the Faculty of Economics in University of Indonesia in 1987.

Sim Idrus Munandar

Sim I DJC_4417-01

Indonesian citizen, was born in Pontianak – Indonesia on 10 July 1954. Having graduated with a Bachelor of Economics degree from Universitas Indonesia in 1981, he began his career in Price Waterhouse & Company and served as Lecturer in STIE Jayakarta and Universitas Tarumanagara until 2014. From 1982 – 2006 he held the position of President Director at PT Bina Danatama Finance. He currently serves as Independent Director at Singapore based companies Samko Timber Limited and Kencana Agri Limited, since 2007 and 2010 respectively. From 2011 – 2015, he served as Independent Director of PT BCA FINANCE. He currently served as Independent Commissioner of PT Kencana Energi Lestari Tbk since 2018.

John Stuart Anderson Slack

John Slack

An Australian citizen, he was appointed as Commissioner of the Company on 18 May 2017, after serving as the Strategy Director of PT Wintermar Offshore Marine Tbk since 2013. Prior to that he held several senior directorship positions in a variety of companies in Indonesia including Vice President Director of PT Bumi Resources Tbk (2012-2013), Business Director of The British School (2005-2011), Director of PT Astra International Tbk (2000-2005), El Paso Energy/ PT Energi Sengkang (1996-1999), CFO of Indonesia Standard Chartered Bank( 1991-1994). Before that he had over 20 years of experience in Accounting and Finance in London, Sydney and Jakarta. He is currently holding the position of Independent Commissioner of PT Jakarta Setiabudi Internasional Tbk and is a Board Member of the British Chamber of Commerce in Indonesia. He is qualified as a Fellow of the Institute of Chartered Accountants in England and Wales and holds a Bachelor of Science in Chemical Engineering from University of Manchester, Institute of Science and Technology, United Kingdom.


Sugiman Layanto


An Indonesian citizen, he is currently the Managing Director of PT Wintermar Offshore Marine Tbk, an appointment he has held since Sept 2010. He has more than 25 years of experience in the offshore marine Industry, having held the position of Managing Director of PT Wintermar since 1988 . He served as Vice Chairman of the National Shipowners Association (INSA) from 2011-2015 and was elected as Chairman in 2019 for the period 2019 – present. He graduated with a Bachelor of Science (Engineering) majoring in Industrial Engineering and Operation Research from University of California (UC Berkeley) USA in 1988.

Nely Layanto

Nely (1)

An Indonesian citizen, she has held the position of Director and Corporate Secretary in PT Wintermar Offshore Marine Tbk and is responsible for Legal and Compliance, and oversees the General Affairs and Human Resources departments.  She has also held the position of Director of PT Wintermar since July 2010 and currently also a member of ICSA. She graduated with a Bachelor of Law degree from  Queen Mary and Westfield College, University of London, UK in 1990 and is a qualified Solicitor at Law from the Law Society, UK.

Janto Lili


An Indonesian citizen, he was appointed as the Finance Director of PT Wintermar Offshore Marine Tbk since August 2013. He has been serving as President Director of PT Sentosasegara Mulia Shipping since May 2013 until the present time. Prior to joining the Company, he worked in  Amir Abadi Jusuf & Aryanto from 2008-2012  where his last position was Auditor Manager. He graduated with a Bachelor of Commerce (Accounting) from  Atmajaya University, Jakarta  in 1999.

Muhamad Shanie Mubarak


Indonesian citizen, he was appointed  Director of the Company on 14 May 2019 and currently holds the position of Chief Operating Officer and Head of Technical Division. He earlier joined the Company as Head of Technical Department and was General Manager of Teras Marine Indonesia (2013 -2018), promoted from Technical and Operation Manager. Previously, he was a  Vessel Manager in PT Meratus Line (2011- 2013), Technical Manager in PT Cosbulk Indonesia Global Shipping (2009-2011) dan Chief Engineer in several foreign companies such as Doha Marine Shipping, Wallem Ship Management and Pacific Carrier Limited (2002-2009). Since November 2007 he holds  Marine Engineer Officer Class I  and is Master Marine Engineer from Sekolah Tinggi Ilmu Pelayaran ,Jakarta