Kieron O'Callaghan

Practice Areas

Kieron O'Callaghan has over 20 years of experience handling a broad range of complex, high-value international commercial disputes under all of the major arbitral rules. As the lead of the London arbitration team and Deputy Global Head of the International Arbitration practice, Kieron is sought out by clients to handle their complex, bet-the-company arbitrations.

Kieron's multijurisdictional practice focuses on various industry sectors, including energy and natural resources, international trade, life sciences, telecoms, and transportation. Legal 500 commends Kieron as a "first-class practitioner without the ego that usually accompanies such ability." At the forefront of legal issues, Kieron has contributed to numerous publications and spoken regularly at arbitration and energy industry events. He was recently appointed to the ICC UK National Committee in 2020 and is an active member of the International Bar Association (IBA) and the Association of International Petroleum Negotiators (AIPN).

Professional Memberships

Member, the IBA

Member, the ICC UK National Committee

Publications

https://www.hoganlovells.com/en/publications/political-transitions-in-africa-and-the-mining-sector-an-outlook-for-the-remainder-of-2025-and-2026

https://www.hoganlovells.com/-/media/project/english-site/our-thinking/pdfs/client-note-on-adr-in-england-and-wales---april-2025.pdf

Experience

Acting for a Middle East energy company in two parallel LCIA arbitrations against a European energy major relating to two gas fields.

Advising a Chinese energy company in relation to the price provisions in a long term crude oil contract with two Russian counterparties.

Acting for a diamond company in a dispute concerning a diamond concession in Africa.

Acting for a U.S. pharmaceutical company against a Spanish distributor in an ICC arbitration arising out of a contract governed by Pennsylvanian law.

Acting for a U.S. food distributor in a dispute with its Italian joint venture partner, subject to UNCITRAL arbitration in London.

Advising a leading aircraft manufacturer regarding a dispute with an Indian freighter airline.

Acting for a Swiss company in an LCIA arbitration arising out of a shareholder agreement in relation to a Serbian bank.

Advising in a dispute concerning a multi-billion pound Anglo-Russian oil and gas joint venture, subject to UNCITRAL arbitration in Stockholm.

Acting for a global company in an LCIA arbitration against a Thai entity arising out of a copper supply contract.

Advising a U.S. oil company in a dispute involving the World Bank and an African Republic.

Arbitration under the LCIA Rules in London on behalf of a major Indian conglomerate against a Japanese banking group.

Acting for the liquidators of a major international bank in a claim before the Commercial Court involving allegations of misfeasance in public office.

A substantial Commercial Court action for an Italian pharmaceutical company in relation to alleged breaches of a licence agreement.

Advising a Turkish utility company in relation to a multi-million pound ICSID claim against the Republic of Azerbaijan.

Advising an oil company in relation to potential investment treaty claims against the Russian federation.

Advising a global natural resources company in relation to an LCIA arbitration relating to the supply of liquid coal tar.

Acting for an international steel trader in relation to an LCIA arbitration against a Chilean purchaser.

Acting for a leading energy company in relation to price review negotiations and related expert determination proceedings.

Advising an energy major on the termination of an EFET Agreement relating to the supply of gas and potential LCIA proceedings.

Acting for an Indonesian company in an ICC arbitration in Singapore against a Thai entity involving claims for alleged misuse of confidential information.

Acting for an aviation company in an ICC arbitration in London involving claims for alleged misuse of confidential information.