Gregg specialises in complex commercial disputes in the energy, natural resources, banking and aviation sectors.
He has extensive experience of heavyweight litigation, usually with a cross-border element, as well as international arbitration under various institutional rules.
Gregg has a particular interest in group litigation. Prior to moving to Melbourne he led the firm's class action practice in London. He is a co-editor and author of the leading English practitioner text on class actions, Class Actions in England and Wales, published in 2018 by Sweet & Maxwell.
Gregg advises a broad range of leading companies on their most challenging and strategically important corporate and commercial disputes and risks. Many of his cases arise in emerging markets, particularly Africa. Having previously been seconded to the firm's Tokyo office, Gregg also has considerable experience of disputes in various Asian jurisdictions.
Gregg is an accredited mediator with the Centre for Effective Dispute Resolution and was a member of the organising committee for the Global Pound Conference in London.
Gregg's experience includes advising
- Société Générale in relation to a $1.5 billion claim in the English Commercial Court by the Libyan Investment Authority in relation to a series of trades where there were allegations of bribery and intimidation
- BP, ENI, Repsol Sinopec and JX Nippon in English Commercial Court proceedings under various gas sales agreements arising out of the prolonged shut-in of a North Sea field
- a Japanese consortium in a LCIA arbitration with satellite offshore litigation in a dispute relating to a mining project in Central Asia
- a US energy company in relation to an expert determination, an arbitration and parallel court proceedings relating to the re-determination of equity interests in a unitised oil field in West Africa
- a British oil exploration company in relation to multi-jurisdictional court and arbitral proceedings concerning disputes rights in an oil concession in Central Africa
- a multinational energy company in a successful application to stay English Commercial Court proceedings for arbitration and related court proceedings in Germany relating to interests in oil assets in Central Asia
- a Japanese trading company in commodity trading disputes in multiple jurisdictions, including an ad hoc arbitration in India
- AerCap in respect of the repossession of aircraft and ensuing English Commercial Court litigation, with parallel proceedings in several other jurisdictions, arising out of the default under and termination of various lease agreements
Gregg was educated at King's College London (LLB), Keble College, Oxford (BCL, MPhil) and Panthéon-Sorbonne, Paris (LLM). Prior to joining the firm, he practised at the bar in England for several years. He became a partner in the firm’s London office in 2014 and moved to Melbourne in 2019. Gregg is admitted in Australia and England & Wales. He is fluent in French.