Mr. Maniatis has more than 30 years of experience as a consultant providing advice and expert testimony on the application of economics, accounting, and corporate finance in estimating commercial damages, project valuation, and regulation. Many engagements have required the communication of complex analyses to international courts.

A respected leader in the firm, Mr. Maniatis has previously served several terms as the firm’s President and one term as the Chairman of the Board, directed Brattle’s Washington and London offices, and led the Litigation practice. He is consistently recognized as a leading expert in Who’s Who Legal’s Arbitration Expert Witness and Quantum of Damages lists, among other accolades. Mr. Maniatis currently serves as a member of the ICCA-ASIL Task Force on Damages.

He has particular expertise in international arbitrations, commercial litigation, and finance and asset valuation. His experience in those areas includes the following:

  • International Arbitrations: Mr. Maniatis has served as a testifying and consulting expert in a number of cases before tribunals under rules of the International Centre for the Settlement of Investment Disputes (ICSID), the International Chamber of Commerce (ICC), and the Permanent Court of Arbitration, involving businesses, and in Asia, Europe, Latin America, and North America. Mr. Maniatis has addressed issues including the development of expected cash flows, discount rates, control premia, country risk adjustments, prejudgment interest, and interpretation of acquisition transactions and publicly-traded company values.
  • Other Commercial Litigation: Mr. Maniatis has testified before US courts and arbitration panels and foreign courts. He has provided testimony and consulting expertise on cases involving antitrust, corporate acquisitions, environmental disputes, intellectual property, product liability, tax, and securities violations.
  • Finance and Asset Valuation: Mr. Maniatis provides consulting and testimony in cases involving profitability measurement, asset and business valuation, cost of capital estimation, taxation, the estimation of country risks, joint ventures, and reasonable royalties. He has recently provided valuation advice to clients in a complex restructuring of joint interests in refining and natural resource businesses.
  • Industry Experience: Mr. Maniatis’s work has involved a very wide range of industries, including agribusiness, airlines, banking and finance, cement, construction, electricity generation and distribution, food and beverage, forestry, medical devices, ports, oil and gas, pharmaceuticals, pulp and paper, and retail.

Mr. Maniatis served as a teaching assistant at Yale University in Accounting and earned letters of distinction in Corporate Finance and International Finance.

He has published on environmental economics, country risk, interest, and valuation methods.


Yale University, MBA in Corporate Finance and International Finance

Wesleyan University, BA in Economics


September 2013

M. Alexis Maniatis, Graham Davis

Copper Mesa Mining Corporation (Canada) v. The Republic of Ecuador, Permanent Court of Arbitration case no. 2012-2, retained by the defendant. Testified Sept 20, 2013. Copper Mesa was awarded 70% of investment costs. At issue was the market value of an allegedly expropriated copper mine in Ecuador. Graham Davis was asked to value the asset and evaluate defendant’s valuation of the asset.