Sunil Mawkin


Sunil has extensive experience in managing high value commercial arbitrations under the ICC, LCIA and SIAC Rules in both common and civil jurisdictions, including England, Australia, Singapore, Indonesia, Hong Kong, India and the Philippines.

Sunil has particular experience advising clients in the energy, construction and infrastructure sectors as well as handling large scale M&A, banking and competition related disputes.

Sunil has been recognised as a “Rising Star” in International Arbitration by Legal 500 in both in 2020 and 2021 rankings.


Representative matters

A global oil and gas exploration and production company (as employer) in respect of multi-billion USD ICC arbitration proceedings seated in Singapore, arising out an EPC Contract concerning the construction of a major LNG plant.

A global oil and gas exploration and production company (as employer) in a USD150m ICC arbitration, seated in Perth, Australia, arising out of an offshore dredging contract.

The subsidiary of a large corporate group in the Philippines in a USD150m ICC arbitration seated in Hong Kong, concerning the construction of a solar wafer facility in the Philippines.

Two leading development bank in respect of a GBP 40M LCIA London seated arbitration concerning a cancelled loan facility.

A major Indonesian gold mining company in respect of a USD 100M LCIA, London seated arbitration concerning warranty claims under an SPA.

A world leading electronics company in defending a USD 800m FIA, Helsinki seated arbitration concerning alleged price fixing.

A major plant operator (as employer) in respect of claims brought by the EPC Contractor arising out of COVID-19 in relation to the construction of a biomass plant.

A major pipeline company (as employer) in respect of various claims brought by contractors under several EPC contracts for extensions of time and additional costs.

Published Work

  • Commentary Article on TMM Division Maritima v Pacific Richfield Marine [2013] SGHC 186 - Mealey's International Arbitration Report, October 2013
  • Commentary Article on Quarella SpA v Scelta Marble Australia [2012] SGHC 166 - Mealey's International Arbitration Report, December 2012
  • One step forward, two steps back - Concurrent delay in England post City Inn, Civil Engineering Surveyor, November 2011
  • The final piece in the puzzle? West Tankers revisited, Mealey's International Arbitration Report, May 2011



Admitted as solicitor, England and Wales, 2012


Legal Practice Course, The College of London, 2010

LLB, Law with American Law, Nottingham University, 2009


A&O Shearman was formed on May 1, 2024 by the combination of Shearman & Sterling LLP and Allen & Overy LLP and their respective affiliates (the legacy firms). Any matters referred to above may include matters undertaken by one or more of the legacy firms rather than A&O Shearman.