llyes works in Oxera’s Energy and Litigation & Arbitration teams. His work focuses on quantum estimation in commercial disputes in the energy sector and on providing advice for regulated energy companies.

Prior to joining Oxera, Ilyes was a Research Associate with Professor Michael Porter at the Harvard Business School, where he quantified the economic impacts of shale oil and gas production and downstream activities. Ilyes also has capital markets experience at a global investment bank, where he structured liability management solutions and catastrophe bonds for insurers, and assisted companies in issuing corporate debt.

Selected project experience

  • Advising a ferrosilicon manufacturer on an abuse of dominance claim against a state-owned power generator (2018–)
  • Providing litigation support to National Grid in evaluating the damages resulting from a European cartel in the power cables market (2018–)
  • Quantifying damages on behalf of an international telecoms company in its ICC dispute with an international digital financial services platform regarding the termination of a sale purchase agreement between the two parties (2018–)
  • Advised the Italian Regulatory Authority for Energy, Networks and Environment (ARERA) on the UK’s experience with TOTEX regulation of gas and electricity transmission and gas distribution companies (2018–)
  • Advised the UK Oil and Gas Authority in relation to the ‘satisfactory expected commercial return’ safeguard within the UK’s maximising economic recovery strategy (2018–)
  • Analysed the incentive mechanisms in the UK’s RIIO-GD1 gas distribution network price control regime in relation to a gas distributor’s strategy for the upcoming RIIO-GD2 price control (2017–)
  • Quantified damages from a dispute involving a breach of contract between a shipping company and a manufacturer of petrochemical products (2017–)
  • Assessed the appropriate discount rate in relation to a personal injury case at the Royal Court of Jersey (2017–18)
  • Quantified damages resulting from a tax claim involving the government of India and a major European independent oil and gas producer (2017–)
  • Estimated the impact of US shale oil and gas energy production on national GDP, employment, wages and government revenues (2015–16)
  • Analysed economic trends, including manufacturing performance, employment, and small business growth, to assess the competitive position and trajectory of the USA (2014–16)


  • MBA, University of Oxford
  • BA Economics and Computer Science, Harvard University