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Andy Derman is the Firm’s International Energy Practice Group Leader and serves as Chairman and Board Member of Thompson & Knight Global Energy Services, LLC, a wholly owned affiliate of the Firm that provides technical, economic, and commercial advisory services to the energy sector. With a concentration on oil and gas investment projects and cross-border transactions, he focuses on providing legal and commercial support in connection with acquisitions, divestments, trades, and mergers; strategic commercial and business advice; large infrastructure projects, including LNG, GTL, and refineries; nationalization/expropriation; anti-corruption (FCPA) and sanction advice; unitizations; boundary (onshore and offshore) disputes; exploration, development, and production operations; production sharing contracts; negotiations; and dispute resolution (litigation, arbitration, and expert testimony).

Andy is “a top international lawyer with a global focus who combines commercial and legal skills.” – Client Testimonial, Chambers Global 

Andy has assisted clients in more than 80 countries on six continents and offers clients a comprehensive understanding of oil and gas activities through experience in a broad spectrum of countries and companies. Prior to joining Thompson & Knight, he served as in-house counsel and later an executive for a large international oil and gas company for nearly 20 years. Andy provides clients with traditional legal representation – contract negotiation/drafting and dispute resolution, including arbitration and litigation – along with business development/commercial counseling, including the identification and capture of oil and gas opportunities.

Andy is a frequent teacher and lecturer at conferences, seminars, and universities on oil and gas related topics. For more than 25 years, he has taught host government contracts (production and sharing agreements, licensing systems, and service contracts) and industry contracts (joint operating agreements, accounting procedures, confidentiality agreements, study and bidding agreements, lifting agreements, farm-in and participation agreements, unitization agreements, etc.).

Representative Matters

  • Represents publicly traded, private, and national oil and gas companies in their global acquisition, divestment, trade, and merger activities
  • Assists national oil and gas companies (in Asia, Africa, the Middle East, and Latin America) and public and private companies expand through the identification, negotiation, and capture of oil and gas assets and companies
  • Negotiates and drafts host government contracts, including production sharing, concession, service and joint venture contracts
  • Negotiates and drafts agreements governing the relationship of investors, including operating agreements, accounting procedures, secondment agreements, lifting agreements, marketing agreements, studying and bidding agreements, service agreements, consulting agreements, farm-in and participation agreements, and unitization agreements
  • Represents clients in infrastructure projects, including engineering and procurement contracts (EPC), oil and gas development projects, pipelines, and LNG projects
  • Counsels host governments and oil and gas companies in the development and preparation of legal and contractual regimes
  • Advises clients in arbitrations and litigation as an advocate and expert witness, and has served as an arbitrator
  • Prepares and counsels clients on unitization and border disputes
  • Assists with client growth in the upstream and downstream sector

Prior Employment

  • Worked for nearly 20 years for Sun Oil Company and its successor, Oryx Energy Company
    • Experience included managing the international and exploration legal departments, the business development function, the international exploration and technology groups, the materials and purchasing department, the environmental oversight function, the reserve administration function, and the operational planning group

Honors & Affiliations


  • Chambers Global by Chambers and Partners (Energy: Oil & Gas (Transactional)), 2011, 2014-2021
  • Chambers Latin America by Chambers and Partners (Energy & Natural Resources), 2018-2021
  • Chambers USA by Chambers and Partners (Energy: Oil & Gas (Transactional)), 2010-2021
  • Dallas Natural Resources Law Lawyer of the Year, The Best Lawyers in America® by Woodward/White Inc., 2015, 2017, 2020
  • Recognized Attorney, The Legal 500 United States by Legalease (Industry Focus: Energy: Transactions: Oil and Gas), 2015-2021
  • The Best Lawyers in America® by Woodward/White Inc. (Energy Law, Natural Resources Law, Oil and Gas Law), 2005-2021
  • Legacy Award, Association of International Petroleum Negotiators, 2017
  • Top 100 Lawyers in Latin America, Latinvex, 2017, 2019-2021
  • Texas Super Lawyers® by Thomson Reuters (Energy & Natural Resources, International), 2003-2020
  • Who’s Who Legal, Thought Leaders Global Elite for Energy, 2021
  • AV Preeminent™ Rating (Legal Ability & Ethical Standards) by Martindale Hubbell, 2020
  • Best Lawyers in Dallas (Energy & Natural Resources), D Magazine, 2017
  • President’s Award, Association of International Petroleum Negotiators, 1999
  • Pelzi Award, “Trade of the Year,” 1995
  • Member of the Year, Association of International Petroleum Negotiators, 1990, 1992, 1993
  • Who’s Who Legal: Texas by Law Business Research Limited (Oil & Gas), 2007-present
  • Who’s Who Legal: Energy by Law Business Research Limited, 2014-2016
  • Expert Guides: Guide to the World’s Leading Energy and Natural Resources Lawyers, 2015
  • ICFM Leading Lawyers 500, InterContinental Finance magazine, 2013
  • The International Who’s Who of Oil & Gas Lawyers, 2007-2011


  • Member, Association of International Petroleum Negotiators; Chair or Co-Chair of numerous AIPN model form committees, including Co-Chair of both the 2006 and 2020 Unitization and Unit Operating Agreement Drafting Committees
  • Member, Advisory Board of the Institute for International and Comparative Law, Center for American and International Law
  • Member, Advisory Board of the Institute for Transnational Arbitration
  • Vice President Conference/Programs, Association of International Petroleum Negotiators, 1999-2000
  • Director, Association of International Petroleum Negotiators, 1992-2000
  • Board of Trustees, Rocky Mountain Mineral Law Foundation, 1997-1999
  • Chairman, Kazakhstan Petroleum Forum, 1993-1996
  • Treasurer, International and Comparative Law Center of the Southwestern Legal Foundation, 1993-1998
  • Dallas Bar Association International Section; Chairman, 1996; Vice Chair, 1995; Treasurer, 1991-1994
  • American Bar Association; Vice Chair, Special Committee on International Energy Law of the Section of Natural Resources, Energy, and Environment Law, 1993-1996
  • Texas Bar Association; Director, International Section, 1990-1993
  • American Corporate Counsel Association; Chairman, International Energy Committee, 1989-1993; Director, Dallas/Fort Worth Chapter, 1986-1989

Education & Admissions


  • 1991, Insead Advanced Management Program; Fontainebleau, France
  • J.D., 1978, Temple University School of Law; Law Review, 1976-1978, National Moot Court Advocate, 1977
  • B.A., 1974, New York University; Justinian Honor Society, Graduated at age 20; VISTA Volunteer, 1975


  • New York
  • Texas
  • U.S. Supreme Court
  • U.S. District Court for the Northern District of Texas

Related Team

Hassan Yassine

International Principal