Harry de Lacey


Harry advises on the project development and construction aspects of transactions across the energy and infrastructure sectors. 

He has experience advising both sponsors and lenders on new technology projects such as green hydrogen, green ammonia and green steel technologies, as well as renewable energy, nuclear power, petrochemical, mining, and transport projects.

Harry’s approach to commercial transactions is informed by his prior experience acting on a range of construction-related claims and disputes, with particular experience in extension of time and cost claims and disputes relating to performance security.


Representative matters

Sizewell C on the construction of the GBP22bn Sizewell C nuclear plant project in the UK.

The ECAs and lenders on the first of a kind utility-scale 1m+ tpa Helios green hydrogen and ammonia project (including solar and wind generation) in KSA. This multi-billion dollar project includes the world’s first large-scale green ammonia offtake contract.

The lenders to Palisade Investment Partners Limited and First Sentier in connection with their acquisition of a 50% interest in the 420MW Macarthur Wind Farm in Australia.

NineDot Energy on the construction of a portfolio of battery storage and solar generation projects across New York. 



Barrister and Solicitor, High Court of New Zealand, 2017


BCom/LLB(Hons) from the University of Auckland (Finance and Innovation & Entrepreneurship double-major), 2011-2016


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.