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Mr. Maniatis is the President and Chief Executive Officer of The Brattle Group and leads the firm's International Arbitration practice.

He previously served as chairman of the firm, directed Brattle’s Washington and London offices, and led the litigation practice.

Mr. Maniatis has more than twenty years of experience providing consulting and expert witness testimony and advising clients on valuation and damages issues in expropriations, contract disputes, competition-related litigation, asset and merger transactions, and regulatory proceedings. He has addressed issues including development of expected cash flows, discount rates, control premia, country risk adjustments, prejudgment interest, and interpretation of acquisition transactions and publicly traded company values.

Mr. Maniatis is consistently recognized as one of the world’s top commercial arbitration expert witnesses by Global Arbitration Review's The International Who’s Who of Commercial Arbitration. He has submitted expert reports and testified on damages issues in proceedings before federal, state, and bankruptcy courts, and before international and domestic arbitration panels. He works with clients in the U.S., Europe, Latin America, Asia, and Australia.

Testimony
Confidential arbitration before the International Court of Arbitration of the International Chamber of Commerce. Expert report and testimony on the quantum of damages arising from the cancellation of a nuclear power plant construction project.
September 2014
Publications
Report
Facts and Figures – Costs and Duration: 2013-2016
October 03, 2017
Prepared for The London Court of International Arbitration
Report
Country Risk and Damages in Investment Arbitration
November 27, 2015
Florin Dorobantu, M. Alexis Maniatis, and Natasha Dupont
Published in the ICSID Review: Foreign Investment Law Journal
Article
A Subject of Interest: Pre-award Interest Rates in International Arbitration
June 01, 2015
Published by The Brattle Group, Inc.
News & Events
September 13, 2018
Alexis Maniatis to Speak at 2nd Annual GAR Live Damages Conference

Brattle President and Principal Alexis Maniatis will speak at the 2nd Annual Global Arbitration Review Live Damages conference to be held September 13, 2018, in London.

December 05, 2017
Six Brattle Principals Recognized as Top Expert Witnesses in Arbitration by Who's Who Legal

The Brattle Group is pleased to announce that Principals Richard Caldwell, Darrell Chodorow, Dan Harris, Carlos Lapuerta, Alexis Maniatis, and Stewart Myers have been named among the world’s top arbitration expert witnesses by Who’s Who Legal.

November 30, 2017
Alexis Maniatis to Present at Juris Conferences' 6th Annual Damages in International Arbitration Conference

Brattle President Alexis Maniatis will present during the Juris Conferences’ 6th Annual Damages in International Arbitration Conference – Damages in International Energy Disputes, taking place November 30, 2017 in Houston, TX.

October 03, 2017
Brattle Contributes to LCIA Analysis on Costs and Duration

With support from economists at The Brattle Group, the London Court of International Arbitration (LCIA) has released a new analysis on costs and duration, which will help users determine which institution is best placed to administer a particular case.

April 26, 2017
Brattle Listed as Leading International Arbitration Expert Witness Provider by Global Arbitration Review

Global Arbitration Review (GAR), a leading resource on international arbitration news and intelligence, named The Brattle Group as one of the most active firms in expert witness services in the field of international arbitration.

February 17, 2017
Alexis Maniatis Elected to ICCA-ASIL Task Force on Damages in International Arbitration

Brattle President Alexis Maniatis was recently elected to serve on the International Council for Commercial Arbitration (ICCA) and American Society of International Law’s (ASIL) Task Force on Damages.

January 13, 2017
Alexis Maniatis to Present at ITA-IEL-ICC Joint Conference on International Energy Arbitration

Brattle President Alexis Maniatis will present at the 4th Annual Institute for Transnational Arbitration (ITA), Institute for Energy Law (IEL), and International Court of Arbitration (ICC) Joint Conference on International Energy Arbitration, taking place January 12-13, 2017 in Houston, TX.

September 16, 2016
Alexis Maniatis to Present at Juris Conferences’ Damages in International Arbitration Conference

Brattle President Alexis Maniatis will present at the Juris Conferences’ Fifth Annual Damages in International Arbitration Conference, taking place September 16, 2016 in Washington, DC.

March 07, 2016
The Brattle Group Featured Among Leading International Arbitration Expert Witness Providers in Survey by Global Arbitration Review

The Brattle Group has been featured in a recent Global Arbitration Review (GAR) analysis of the most active firms for providing expert witness services in the field of international arbitration.

January 27, 2016
Four Brattle Principals Recognized as Leading Arbitration Witnesses by Who’s Who Legal Arbitration 2016: Expert Witnesses Analysis

The Brattle Group is pleased to announce that Principals Carlos Lapuerta, Alexis Maniatis, Stewart Myers, and José Antonio Garcia have been named among the world’s leading arbitration experts in Who’s Who Legal Arbitration 2016: Expert Witnesses Analysis.

December 10, 2015
Brattle Economists Publish Paper on the Impact of Country Risk on Damages in Investment Arbitration in the ICSID Review: Foreign Investment Law Journal

Brattle economists recently addressed the impact of country risk on the quantum of damages in investment arbitration.

September 24, 2015
Alexis Maniatis to Present at Global Arbitration Review’s 4th Annual Live New York Conference

Brattle President Alexis Maniatis will present at the Global Arbitration Review (GAR) Live New York Conference, taking place on September 24, 2015.

June 01, 2015
Brattle Economists Author Article on Pre-award Interest Rates in International Arbitration

Brattle principals Dan Harris, Richard Caldwell, and Alexis Maniatis recently authored an article on pre-award interest rates and the significant impact they can have on damages awards the longer the legal process takes.

November 13, 2014
Brattle Principals Recognized as Leading Arbitration Witnesses by Global Arbitration Review’s Who’s Who Legal

Four Brattle principals have been recognized as among the world’s top international arbitration experts by Global Arbitration Review in their annual survey, Who’s Who Legal: Arbitration.

September 29, 2014
Brattle to Co-Host Seminar on the New Rules of the London Court of International Arbitration

Brattle will co-present the upcoming seminar, “The New London Court of International Arbitration (LCIA) Arbitration Rules,” which will take place on September 29, 2014 in Washington DC.