John Haigney


John is a junior associate in A&O Shearman's Advanced Delivery Legal team.

Since joining in January 2014, John has worked on a wide variety of corporate matters and is a senior member of ADL's Corporate team. He has extensive experience working on corporate transactions involving due diligence relating to various international mergers and acquisitions, disposals and refinancings together with 10b-5 reviews in preparation for IPOs.

He is well versed in project managing large-scale multi-jurisdictional matters, which includes preparing and drafting transactional documents/reports as well as co-ordinating input from lawyers globally. John has considerable experience in drafting, negotiating and coordinating processes for Non-Disclosure Agreements for large corporate investment/private equity/pharmaceutical clients.

In addition has managed large-scale document intensive review exercises utilising various legal technology tools. He also has experience managing small- and large-scale redaction exercises.



Admitted to the roll as a Solicitor (England & Wales) - Solicitors Regulation Authority, 2022

Chartered Legal Executive Lawyer - CILEx, 2020


LLB Hons Law, University of Ulster, 2013

Legal Technology and Innovation, Ulster University, 2018

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.