People
Mark McLennan maintains a global disputes practice focused on complex, high-value claims in the construction, energy, and infrastructure sectors. He has acted for investors, owners, states, and contractors in multi-billion-dollar arbitrations across Europe, Asia, the Middle East, and the Americas.
Mark focuses on disputes shaped by factual complexity, layered contractual frameworks, and cross-border legal systems—including contested terminations, joint venture disputes, and infrastructure claims with public and private dimensions. He has represented clients in proceedings under all major institutional rules, including the ICC, LCIA, SIAC, and the AAA.
Before joining King & Spalding, Mark practiced with two leading international arbitration teams in New York and London, where he trained 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 to practice in New York, Texas, and New South Wales.
LL.M., London School of Economics and Political Science, UK
J.D., University of Sydney Law School
B.A., University of Sydney, Australia
New South Wales
New York
Texas
English
April 11, 2025
King & Spalding Once Again Earns Top Spot on Global Arbitration Review’s GAR 30 Ranking
March 22, 2024
King & Spalding Secures $900 Million for Reficar in Its Dispute with Chicago Bridge & Iron (CB&I)
Acting for a major international construction and project management company in regards to multibillion dollar claims arising out of an oil refinery in South Asia.
Representing an owner in a AAA arbitration arising out of the operation of a wind farm in West Texas involving claims of gross negligence and hundreds of millions in dispute.
Acting for a state-owned oil company enforcing a billion dollar award from an ICC dispute arising out of the construction of one of the largest refineries in the world, including concurrent multinational insolvency proceedings.
See more
April 11, 2025
King & Spalding Once Again Earns Top Spot on Global Arbitration Review’s GAR 30 Ranking
March 22, 2024
King & Spalding Secures $900 Million for Reficar in Its Dispute with Chicago Bridge & Iron (CB&I)
Acting for a major international construction and project management company in regards to multibillion dollar claims arising out of an oil refinery in South Asia.
Representing an owner in a AAA arbitration arising out of the operation of a wind farm in West Texas involving claims of gross negligence and hundreds of millions in dispute.
Acting for a state-owned oil company enforcing a billion dollar award from an ICC dispute arising out of the construction of one of the largest refineries in the world, including concurrent multinational insolvency proceedings.
See more
April 11, 2025
King & Spalding Once Again Earns Top Spot on Global Arbitration Review’s GAR 30 Ranking
March 22, 2024
King & Spalding Secures $900 Million for Reficar in Its Dispute with Chicago Bridge & Iron (CB&I)
LL.M., London School of Economics and Political Science, UK
J.D., University of Sydney Law School
B.A., University of Sydney, Australia
New South Wales
New York
Texas
English