Mick McArdle is an associate focusing on oil and gas transactions in the Corporate & Securities practice of the London office. He joined Mayer Brown in 2019 from another international law firm. Mick’s core practice includes upstream and midstream M&A deals and oil, gas and LNG sales and project developments (primarily in emerging markets) for international oil companies and NOCs / government companies. Mick has undertaken secondments to three listed international oil companies across their procurement, upstream exploration and access and business development divisions. 

The Legal 500 2018-19 recognises Mick for his "diligence and attention to detail which ensures all work streams progress in a controlled manner".

Mick’s practice also includes advising clients on a wide range of commercial matters in relation to their upstream businesses. This includes joint ventures (JOAs, UUOAs, shareholders’ agreements); advising in respect of agreements with host governments (such as Host Government Agreements for infrastructure developments, Licences, Concessions, Petroleum Agreements, PSAs and PSCs); drafting and negotiating upstream contracts such as decommissioning security agreements, transportation agreements and product sales agreements; and involvement in financings, disputes and restructurings in the sector.


Prior to joining Mayer Brown:

  • Advising a European national oil company on the monetisation of a major offshore natural gas discovery, including all aspects of its product sales arrangements and cross-continental midstream infrastructure development.
  • Advising a European oil & gas company on its multi-$billion purchase of a stake a super-giant Russian gas field.
  • Advising a supermajor on the sale of its interests in several later-life assets and related infrastructure on the UKCS (including complex asset-backed security and ‘market-first’ retained decommissioning cost mechanics).
  • Advising a supermajor on its purchase of a stake in a major gas development project offshore Egypt (including the negotiation of a new joint venture).
  • Advising a supermajor on the sale of a strategically important oil pipeline system from the UKCS to the British mainland.
  • Advising a European service company on a new JV relationship with a Nigerian indigenous oil & gas development company, including a novel “synthetic equity” remuneration model.
  • Advising a supermajor on its farmout of major onshore and offshore pre-development oil and gas assets in Libya.
  • Advising a supermajor on new country entries and government negotiations across west Africa, including Sao Tome and Principe, Ghana and Sierra Leone
  • Advising a European major on a hub-based gas sales arrangement with a national oil company in an east European nation.
  • Advising a European major on its divestment of its upstream business in Trinidad and Tobago. 


  • England and Wales
The Legal 500 2018-19 recognises Mick for his "diligence and attention to detail which ensures all work streams progress in a controlled manner".