Sean O'Neill

Practice Areas

Sean O’Neill is a partner in the New York office of Milbank LLP and a member of the firm’s Global Project, Energy and Infrastructure Finance Group.

Mr. O’Neill’s experience includes the representation of project sponsors (investment firms/portfolio companies) and financial institutions (banks, institutional investors, direct lenders) in a range of domestic and cross-border financings and investment transactions across industrial sectors, including oil and gas / LNG, power (renewable/conventional), energy transition projects, transportation / logistics infrastructure, water, digital infrastructure and mining.

Mr. O’Neill earned his J.D. from Columbia, where he was a Harlan Fiske Stone Scholar and an editor for the Yearbook on International Investment Law & Policy. He received his M.B.A. from Columbia Business School and his B.A. from the University of Pennsylvania, where he graduated magna cum laude with honors in political science and economic history.