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Gigi Lockhart

she/herSenior Associate
UK
About

Gigi Lockhart specialises in high-value, multi-jurisdictional disputes across the energy, defence, construction and infrastructure, cyber and technology sectors.

Gigi advises multinational corporates, sovereign States and intergovernmental organisations on cross-border arbitration and litigation, helping to deliver both successful litigated and negotiated outcomes. She leads workstreams from dispute inception to award, judgment or settlement, including by instructing counsel and experts, and coordinating strategy across jurisdictions.

Areas of FocusLitigation, Arbitration and InvestigationsRegulatory and Government AffairsEnergy and Natural ResourcesAerospace and DefenseTechnologyInfrastructure, Construction and Transport
Professional QualificationsSolicitor of the Supreme Court of New South Wales, 2020Solicitor of the High Court of Australia, 2020
Education
  • University of New South Wales, Bachelor of Laws / Bachelor of Arts (International Relations) (2020)
  • McGill University, Exchange (2017)

EXPERIENCE

  • Acting for the Argentine Republic in the Supreme Court of New South Wales, Court of Appeal and High Court of Australia to resist the enforcement of a USD16 billion New York District Court Judgment in Australia.
  • Acting for a related entity of the United Nations in a PCA-administered arbitration seated in Geneva against a US defence contractor concerning defective armoured vests supplied for use in the Russia-Ukraine War (UNCITRAL Rules).
  • Acting for a global chemical producer in a London-seated international commercial arbitration concerning alleged delivery failures in the supply of bio-methanol (Ad hoc; Arbitration Act 1996 (UK)).
  • Acting for a global defence company in connection with a multi-billion-dollar submarine contract and achieving favourable settlement for the client following the AUKUS announcement.
  • Acting for a US privacy and software company in an international commercial arbitration seated in Mumbai against a major Indian national bank, arising from unpaid subscription fees and wrongful termination of a services agreement (Arbitration and Conciliation Act 1996, India).
  • Acting for a global engineering company in a USD100 million dispute concerning the contractual pricing mechanism for the purchase and maintenance of aircraft engines.
  • Acting for a global technology services company in a dispute and regulatory investigation following a data breach affecting hundreds of thousands of university student records.
  • Acting for a US-based energy company in various disputes against a Filipino power purchaser and an Australian power plant owner concerning alleged defects in steam powered generators.
  • Acting for Canadian energy company in New South Wales Land & Environment Court proceedings relating to the objection to the development of a 200 MW Advanced Compressed Air Energy Storage facility.

Publications

Seminars and speaker events

  • Delivered training on ‘ADR and Negotiation skills’ to client, International Organization for Migration in Geneva, Switzerland.
  • Delivered training on ‘Recent commercial and contract law developments’ to client, the English Premier League in London, United Kingdom.
  • Chaired a panel discussion of senior representatives from the Australian Department of Defence and Thales: ‘From Alliance to Arbitration – Navigating the spectrum of disputes in the context of evolving global security frameworks, increased defence spending and the AUKUS alliance’ in Sydney, Australia.
  • Presented seminar on ‘Dispute Resolution Forums in Special Economic Zones’ to the University of the Western Cape’s Mercantile and Labour Law Department master class.

Additional Qualifications

  • Judge, International Chamber of Commerce Asia-Pacific Commercial Mediation Competition (2026)
  • Adjudicator, University of New South Wales Senior Mediation Competition (2024)

My latest insights

Publication

The Defence Strategic Review in Action: Hanwha’s Redback wins LAND400 Phase 3 Project

2 August 2023 .3 minute read

Publication

Diving into the unregulated Deep Sea

1 August 2023 .3 minute read

Publication

High Court of Australia rejects Spain’s sovereign immunity claim and clarifies two-step...

18 April 2023 .7 minute read

View All

Connect

Phone

+44 20 7153 7777
(Work, London)

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