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Mark McLennan maintains an international arbitration practice with particular expertise in high-stakes commercial, investment, construction, and global award enforcement disputes. Mark regularly acts for investors, owners, states, and contractors in proceedings arising from major energy, aviation, infrastructure, and natural-resources projects across Europe, Asia, the Middle East, and the Americas.
Mark’s work often centers on disputes defined by factual and contractual complexity, sovereign involvement, and overlapping legal regimes. His experience includes contested terminations, joint-venture disputes, and cross-border infrastructure claims with public and private dimensions. He has represented clients in arbitrations conducted under all major institutional rules including the ICC, LCIA, SIAC, and AAA, as well as ICSID and ad hoc proceedings. Mark is experienced in all phases of international arbitration and enforcement proceedings, including advising clients in award recognition and enforcement efforts under the New York Convention.
Before joining King & Spalding, Mark practiced with leading international arbitration teams in New York and London, training under several of the field’s foremost practitioners. He holds a J.D. and B.A. from the University of Sydney and an LL.M. from the London School of Economics.
Mark is admitted in New York, Texas, and New South Wales.
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