Dioputra “Ilham” Oepangat is a co-founder and partner of Mangkoenagoro, Dirgantara, Oepangat (“MDO”). He is the Litigation and Alternative Dispute Resolution Director at MDO.

Ilham has experience assisting and representing clients in various disputes throughout the Indonesian courts, as well as in international and domestic arbitration forums such as ICC, SIAC, and BANI. Ilham has also assisted clients in complex criminal investigations and litigation at various law enforcement agencies and courts.

Other than his main practice, Ilham has a keen interest in medicolegal disputes (especially malpractice related disputes) and has experience appearing before the Indonesian Physicians Ethics Tribunal (MKDKI).

Ilham has assisted stakeholders in the drafting of a proposed amendment to Indonesia’s Arbitration Law to include principles and technical procedures from the UNCITRAL Model Law, and assisted his past firm who acted as an expert to the Indonesian Supreme Court Drafting Committee on the promulgation of the 2019 Supreme Court Regulation on the “Code of Conduct on State Seizure and Detention of Property as Proceeds of Crime”.

Outside of work, Ilham is a moot court coach of Universitas Indonesia for teams competing within the scope of arbitration and mediation. Ilham also sits as a board member of an international hotel and F&B chain.


Sarjana Hukum
Universitas Indonesia (2015)
Cum Laude & Male Valedictorian


Perhimpunan Advokat Indonesia

Chartered Institute of Arbitrators – East
Asia Branch

Indonesia Young Arbitration Community
(Founding Co-Director)


Bahasa Indonesia, English, German


  • Guest Lecturer on Arbitration Law at President University, specifically on arbitral procedure (2022).
  • Speaker in training hosted by PT Donggi-Senoro LNG titled: “Corporate Whistleblowing in the Downstream Oil and Gas Sector” (2021).
  • Speaker in webinar hosted by the Indonesian Ministry of Finance titled “International Trade Disputes at the WTO” (2021).
  • Author, Litigation and Enforcement in Indonesia: Overview, published by Thomson Reuters Practical Law (2020).
  • Author, Oil and Gas Regulation Overview: Indonesia, published by Thomson Reuters Practical Law (2020).
  • Speaker in the Indonesian Advocate Bar Course (PKPA) hosted by the Indonesian Advocates Congress (KAI) and Metro Jaya Police Department regarding “Domestic and International Arbitration Procedure” (2019).
  • Author, Recent Developments in the Structure of Oil and Gas Contracts in Indonesia, published by Energy and Natural Resources 2019: Expert Guide by Corporate Live Wire (2019).
  • Author, Business Crime, and Investigation in Indonesia, published by Thomson Reuters Practical Law (2018).
  • Author, Financial Crime in Indonesia, published by Thomson Reuters Practical Law (2018).