James is a Counsel at UMBRA – Strategic Legal Solutions and the go-to lawyer for dispute resolution issues requiring advanced and comprehensive legal analysis, either advisory or contentious. He is experienced in handling disputes relating to cross-border transactions and always provides commercial and pragmatic solutions for his clients.

 

James is a dual-qualified practitioner in both civil law (an advocate in Indonesia) and common law legal systems (a solicitor in England & Wales). In his career, he has practiced with the largest law firm (with an international affiliation) in Indonesia and one of the magic circle law firms in Singapore, with a stint at the firm’s headquarter in London, United Kingdom. He has represented major multinational companies in commercial and investor-state disputes as well as advised States on international investment law.

 

Having taken a Master’s Degree in International Economic Law and Policy at Universidad de Barcelona along with his experience in working with various government officials, James understands well the commercial aspects of legal issues and always searches for pragmatic and legal ways to resolve disputes. His experience of working at major international law firms has equipped him with deep understanding of wide range of industries, including telecommunication, power, energy, infrastructure, hospitality, automotive, as well as livestock.

 

James has recently completed his doctoral study at the City University of Hong Kong. His research focuses on the diverging evidence-taking procedures in civil and common law jurisdictions and their impacts on international arbitration.

Junianto James Losari, S.H., LL.M., Ph.D.

Counsel
+62 21 5082 0999

james@umbra.law

Practice Focus

Dispute Resolution

 

Sub-Practice & Industry

Commercial international arbitration, investment treaty arbitration, Mediation, Advisory, Power, Energy & Infrastructure

 

Language

Indonesian & English

Professional Affiliations

  • Solicitor of England and Wales – Solicitors Regulation Authority (SRA).
  • Member of the Association of Indonesian Advocates (PERADI).

 

Education

  • Faculty of Law, Universitas Pelita Harapan, Bachelor of Laws (S.H.) (magna cum laude) (2009).
  • Universidad de Barcelona, Master of Laws (LL.M) (2011).
  • City University of Hong Kong, Doctor of Philosophy (Ph.D.) in Law (2025).

 

Awards & Accolades

  • Best Essay Award Winner of the CIArb (Singapore Chapter) Essay Competition (sponsored by 39 Essex Chambers) (2015).
  • Excellence in Advocacy Award in the Singapore International Arbitration Academy held by the Centre for International Law (2014).
  • Best Claimant Memorial Award in the Skadden Arps FDI Moot Court Competition in London, UK (2011).

 

Honors

  • Recipient of the Hong Kong PhD Fellowship Scheme award from the Hong Kong SAR government to pursue doctoral study in Hong Kong.
  • Recipient of the Belt and Road Scholarship from the Hong Kong government.
  • Recipient of Universidad de Barcelona Tuition Scholarship for Master’s Program.
  • Best Graduate of Faculty of Law (Valedictorian with Magna Cum Laude), Universitas Pelita Harapan – recipient of consecutive honors in all academic years (2009).

While at UMBRA

Litigation and Alternative Dispute Resolution

  • Representing a Special Purpose Company in a dispute with its service provider subcontractor under the BANI Rules relating to Coal Steam Power Plant Project (2 x 1,000 MW).
  • Representing a foreign capital investment securities trading company in contractual disputes against 3 of its customers at the Indonesian Capital Market Arbitration Board (BAPMI) and the LAPS. The disputes are part of the disputes that arose in relation to a mega-corruption case in Indonesia.
  • Representing a foreign capital investment securities trading company in filing civil lawsuits and police reports against its former President Director, who was suspected of violating applicable laws, regulations, and the company’s internal policies.
  • Representing a well-known food holding company in South Korea to register and execute an arbitration award by the Korean Commercial Arbitration Board in the Republic of Korea with a winning value of US $320,000.
  • Representing group companies of an Indonesian conglomerate in shareholder disputes before the Indonesian courts.

 

Prior to Joining UMBRA

Antidumping

  • Assisting an Indonesian company exporting jewellery to the US in responding to the US ITC’s antidumping queries.

 

Oil and Gas

  • Representing a major oil and gas company in a dispute concerning dredging in a Perth-seated arbitration under ICC Rules.
  • Defending a global oil and gas company in a dispute concerning deep-sea offshore oil drilling in a Southeast Asian country in a Singapore-seated arbitration under SIAC Rules.
  • Representing major oil and gas companies in a dispute involving a South Asian state in a London-seated LCIA arbitration under UNCITRAL Rules.

 

Energy

  • Advising an American company in a potential dispute relating to an investment in a solar energy plant against an Asian State under a bilateral investment agreement.

 

Automotive

  • Representing a global automotive company in claiming against a South Asian state in a Singapore-seated arbitration under UNCITRAL Rules.

 

Telecommunications

  • Representing a major European telecommunication company in a dispute with its contractor relating to its investment in a Southeast Asian country in a Singapore-seated arbitration under SIAC Rules.

 

Hospitality

  • Advising a major hotel chain regarding a potential claim that may be brought against it in a Southeast Asian state by a landowner.
  • Advising an Asian state in an investment treaty dispute brought against it by a major Asian developer relating to the development of a resort (involvement limited to the preliminary advice).
  • Representing a South Asian company in a dispute relating to hotel management with its joint venture partner (in a challenge against an arbitrator) in a Singapore-seated arbitration under ICC Rules.

 

Manufacturing

  • Representing an Indonesian company, which is one of the key players in the steel industry in Southeast Asia, in a dispute against the company’s minority shareholders before the Indonesian courts.

 

Banking

  • Representing a major international bank before the Indonesian courts in relation to its customer’s default arising from a derivative transaction.

Publication

  • “Geography has little impact: a comparative study on the role of judges in Singapore and Indonesia in the taking of evidence in civil proceedings” (2024) 32 Asia Pacific Law Review 1.
    ‘Conformity of Indonesia’s LCRs with its trade and investment commitments’ in L Y Ing and G M Grossman, Local Content Requirements: Promises and Pitfalls (2024) Routledge (co-author).
  • “An International Investment Agreement for East Asia: Issues, Recent Developments and Refinements” in L Y Ing, M Richardson, and S Urata, East Asian Integration: Goods, Services and Investment (2019) Routledge-ERIA Studies in Development Economics.
  • “A Baseline Study for RCEP’s Investment Chapter: Picking the Right Protection Standards” in J Chaise, T Ishikawa and S Jusoh (eds), Asia’s Changing International Investment Regime: Sustainability, Regionalization and Arbitration (2017) Springer, p. 141-162.
  • “Comprehensive or BIT by BIT: The ACIA and Indonesia’s BITs” (2015) 6(1) Asian Journal of International Law 15-45.
  • “A Clash of Treaties: The Legitimacy of Countermeasures in International Trade Law and International Investment Law” (2015) 16(2) Journal of World Investment & Trade 274-313 (co-author).
  • “Pacific Rim Investment Treaty Practice: Regional Considerations—Reflective or Reactionary? Indonesia’s Approaches to International Investment Agreements and Recommendations for the Future” (2015) 12(1) Transnational Dispute Management Journal (co-author).
  • “Difficulties with Decentralization and Due Process: Indonesia’s Recent Experiences with International Investment Agreements and Investor-State Disputes” (2015) 16(5-6) Journal of World Investment & Trade 981-1017 (co-author).
  • “Which is to be the Master?: Extra-Arbitral Interpretative Procedures for IIAs” in J Kalicki and A Joubin-Bret (eds), Reshaping the Investor-State Dispute Settlement System: Journeys for the 21st Century (2015) Brill Nijhoff Publishers (co-author).
  • “Indonesia and the Establishment of the ASEAN Economic Community in 2015: Are We There Yet?” (2014) Policy Brief Paper No. 10, Office of Regional Economic Integration (co-author).
  • “The Facilitation of Trade by the Rule of Law: The Cases of Singapore and ASEAN” in M Jansen, MS Jailab and M Smeets (eds), Connecting to Global Market (2014) WTO Publications (co-author).
  • “No Coverage for Tobacco Industries With Regard to Tobacco-Control Measures—The Future of International Investment Agreements?” (2012) 9(5) Transnational Dispute Management Journal (co-author).

 

Public Speaking & Academic Activities

  • Speaker in “Policy Dialogue on Trade and Investment Integration”, held by the Ministry of Trade of the Republic of Indonesia to discuss about international investment agreements, investor-state dispute settlement, and related issues (2019).
  • Facilitator in the Singapore International Arbitration Centre Academy workshop on “Drafting and Handling an Application for Expedited Procedure”, held in Jakarta, Indonesia (2019).
  • Speaker in the Society of International Economic Law Conference in Washington DC, USA (2018).
    Speaker in the Singapore International Arbitration Academy in the panel discussing “What You Need to Know about the New Treaty Models” in Singapore (2016).
  • Speaker in “Legal Review of Indonesia’s International Investment Agreements”, held by the Ministry of Foreign Affairs of the Republic of Indonesia in Jakarta, Indonesia (2014).
  • Speaker in “Training on International Investment Law”, held by Economic Research Institute for East Asia and ASEAN for Myanmar government officials in Yangon, Myanmar (2014).
  • Lecturer in Universitas Pelita Harapan (Master’s Programme) (Investment law) (2015-2016).
ABOUT

James is a Counsel at UMBRA – Strategic Legal Solutions and the go-to lawyer for dispute resolution issues requiring advanced and comprehensive legal analysis, either advisory or contentious. He is experienced in handling disputes relating to cross-border transactions and always provides commercial and pragmatic solutions for his clients.

 

James is a dual-qualified practitioner in both civil law (an advocate in Indonesia) and common law legal systems (a solicitor in England & Wales). In his career, he has practiced with the largest law firm (with an international affiliation) in Indonesia and one of the magic circle law firms in Singapore, with a stint at the firm’s headquarter in London, United Kingdom. He has represented major multinational companies in commercial and investor-state disputes as well as advised States on international investment law.

 

Having taken a Master’s Degree in International Economic Law and Policy at Universidad de Barcelona along with his experience in working with various government officials, James understands well the commercial aspects of legal issues and always searches for pragmatic and legal ways to resolve disputes. His experience of working at major international law firms has equipped him with deep understanding of wide range of industries, including telecommunication, power, energy, infrastructure, hospitality, automotive, as well as livestock.

 

James has recently completed his doctoral study at the City University of Hong Kong. His research focuses on the diverging evidence-taking procedures in civil and common law jurisdictions and their impacts on international arbitration.

Junianto James Losari, S.H., LL.M., Ph.D.

Counsel
+62 21 5082 0999

james@umbra.law

Practice Focus

Dispute Resolution

 

Sub-Practice & Industry

Commercial international arbitration, investment treaty arbitration, Mediation, Advisory, Power, Energy & Infrastructure

 

Language

Indonesian & English

PROFILE DETAILS

Professional Affiliations

  • Solicitor of England and Wales – Solicitors Regulation Authority (SRA).
  • Member of the Association of Indonesian Advocates (PERADI).

 

Education

  • Faculty of Law, Universitas Pelita Harapan, Bachelor of Laws (S.H.) (magna cum laude) (2009).
  • Universidad de Barcelona, Master of Laws (LL.M) (2011).
  • City University of Hong Kong, Doctor of Philosophy (Ph.D.) in Law (2025).

 

Awards & Accolades

  • Best Essay Award Winner of the CIArb (Singapore Chapter) Essay Competition (sponsored by 39 Essex Chambers) (2015).
  • Excellence in Advocacy Award in the Singapore International Arbitration Academy held by the Centre for International Law (2014).
  • Best Claimant Memorial Award in the Skadden Arps FDI Moot Court Competition in London, UK (2011).

 

Honors

  • Recipient of the Hong Kong PhD Fellowship Scheme award from the Hong Kong SAR government to pursue doctoral study in Hong Kong.
  • Recipient of the Belt and Road Scholarship from the Hong Kong government.
  • Recipient of Universidad de Barcelona Tuition Scholarship for Master’s Program.
  • Best Graduate of Faculty of Law (Valedictorian with Magna Cum Laude), Universitas Pelita Harapan – recipient of consecutive honors in all academic years (2009).
REPRESENTATIVE DEALS

While at UMBRA

Litigation and Alternative Dispute Resolution

  • Representing a Special Purpose Company in a dispute with its service provider subcontractor under the BANI Rules relating to Coal Steam Power Plant Project (2 x 1,000 MW).
  • Representing a foreign capital investment securities trading company in contractual disputes against 3 of its customers at the Indonesian Capital Market Arbitration Board (BAPMI) and the LAPS. The disputes are part of the disputes that arose in relation to a mega-corruption case in Indonesia.
  • Representing a foreign capital investment securities trading company in filing civil lawsuits and police reports against its former President Director, who was suspected of violating applicable laws, regulations, and the company’s internal policies.
  • Representing a well-known food holding company in South Korea to register and execute an arbitration award by the Korean Commercial Arbitration Board in the Republic of Korea with a winning value of US $320,000.
  • Representing group companies of an Indonesian conglomerate in shareholder disputes before the Indonesian courts.

 

Prior to Joining UMBRA

Antidumping

  • Assisting an Indonesian company exporting jewellery to the US in responding to the US ITC’s antidumping queries.

 

Oil and Gas

  • Representing a major oil and gas company in a dispute concerning dredging in a Perth-seated arbitration under ICC Rules.
  • Defending a global oil and gas company in a dispute concerning deep-sea offshore oil drilling in a Southeast Asian country in a Singapore-seated arbitration under SIAC Rules.
  • Representing major oil and gas companies in a dispute involving a South Asian state in a London-seated LCIA arbitration under UNCITRAL Rules.

 

Energy

  • Advising an American company in a potential dispute relating to an investment in a solar energy plant against an Asian State under a bilateral investment agreement.

 

Automotive

  • Representing a global automotive company in claiming against a South Asian state in a Singapore-seated arbitration under UNCITRAL Rules.

 

Telecommunications

  • Representing a major European telecommunication company in a dispute with its contractor relating to its investment in a Southeast Asian country in a Singapore-seated arbitration under SIAC Rules.

 

Hospitality

  • Advising a major hotel chain regarding a potential claim that may be brought against it in a Southeast Asian state by a landowner.
  • Advising an Asian state in an investment treaty dispute brought against it by a major Asian developer relating to the development of a resort (involvement limited to the preliminary advice).
  • Representing a South Asian company in a dispute relating to hotel management with its joint venture partner (in a challenge against an arbitrator) in a Singapore-seated arbitration under ICC Rules.

 

Manufacturing

  • Representing an Indonesian company, which is one of the key players in the steel industry in Southeast Asia, in a dispute against the company’s minority shareholders before the Indonesian courts.

 

Banking

  • Representing a major international bank before the Indonesian courts in relation to its customer’s default arising from a derivative transaction.
PUBLICATION AND EVENT

Publication

  • “Geography has little impact: a comparative study on the role of judges in Singapore and Indonesia in the taking of evidence in civil proceedings” (2024) 32 Asia Pacific Law Review 1.
    ‘Conformity of Indonesia’s LCRs with its trade and investment commitments’ in L Y Ing and G M Grossman, Local Content Requirements: Promises and Pitfalls (2024) Routledge (co-author).
  • “An International Investment Agreement for East Asia: Issues, Recent Developments and Refinements” in L Y Ing, M Richardson, and S Urata, East Asian Integration: Goods, Services and Investment (2019) Routledge-ERIA Studies in Development Economics.
  • “A Baseline Study for RCEP’s Investment Chapter: Picking the Right Protection Standards” in J Chaise, T Ishikawa and S Jusoh (eds), Asia’s Changing International Investment Regime: Sustainability, Regionalization and Arbitration (2017) Springer, p. 141-162.
  • “Comprehensive or BIT by BIT: The ACIA and Indonesia’s BITs” (2015) 6(1) Asian Journal of International Law 15-45.
  • “A Clash of Treaties: The Legitimacy of Countermeasures in International Trade Law and International Investment Law” (2015) 16(2) Journal of World Investment & Trade 274-313 (co-author).
  • “Pacific Rim Investment Treaty Practice: Regional Considerations—Reflective or Reactionary? Indonesia’s Approaches to International Investment Agreements and Recommendations for the Future” (2015) 12(1) Transnational Dispute Management Journal (co-author).
  • “Difficulties with Decentralization and Due Process: Indonesia’s Recent Experiences with International Investment Agreements and Investor-State Disputes” (2015) 16(5-6) Journal of World Investment & Trade 981-1017 (co-author).
  • “Which is to be the Master?: Extra-Arbitral Interpretative Procedures for IIAs” in J Kalicki and A Joubin-Bret (eds), Reshaping the Investor-State Dispute Settlement System: Journeys for the 21st Century (2015) Brill Nijhoff Publishers (co-author).
  • “Indonesia and the Establishment of the ASEAN Economic Community in 2015: Are We There Yet?” (2014) Policy Brief Paper No. 10, Office of Regional Economic Integration (co-author).
  • “The Facilitation of Trade by the Rule of Law: The Cases of Singapore and ASEAN” in M Jansen, MS Jailab and M Smeets (eds), Connecting to Global Market (2014) WTO Publications (co-author).
  • “No Coverage for Tobacco Industries With Regard to Tobacco-Control Measures—The Future of International Investment Agreements?” (2012) 9(5) Transnational Dispute Management Journal (co-author).

 

Public Speaking & Academic Activities

  • Speaker in “Policy Dialogue on Trade and Investment Integration”, held by the Ministry of Trade of the Republic of Indonesia to discuss about international investment agreements, investor-state dispute settlement, and related issues (2019).
  • Facilitator in the Singapore International Arbitration Centre Academy workshop on “Drafting and Handling an Application for Expedited Procedure”, held in Jakarta, Indonesia (2019).
  • Speaker in the Society of International Economic Law Conference in Washington DC, USA (2018).
    Speaker in the Singapore International Arbitration Academy in the panel discussing “What You Need to Know about the New Treaty Models” in Singapore (2016).
  • Speaker in “Legal Review of Indonesia’s International Investment Agreements”, held by the Ministry of Foreign Affairs of the Republic of Indonesia in Jakarta, Indonesia (2014).
  • Speaker in “Training on International Investment Law”, held by Economic Research Institute for East Asia and ASEAN for Myanmar government officials in Yangon, Myanmar (2014).
  • Lecturer in Universitas Pelita Harapan (Master’s Programme) (Investment law) (2015-2016).