Andrew B. Derman

Andrew B. Derman

International Energy Practice Leader |
  • 214.969.1307
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International Energy Practice Leader

  • Thompson & Knight LLP
    One Arts Plaza
    1722 Routh Street, Suite 1500
    Dallas, TX 75201 USA
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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 has assisted clients in more than 50 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's practice is equally divided between providing clients with traditional legal representation (contract negotiation and drafting) and business development/commercial counseling (the identification and capture of oil and gas opportunities).

According to one client quoted in the prestigious Chambers Global 2017 directory by Chambers & Partners, Andy is  "a top international lawyer with a global focus who combines commercial and legal skills." Additionally, he was recently honored with the Legacy Award by the Association of International Petroleum Negotiators.

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, unitization agreements, lifting agreements, etc.) at the Advanced Financial Management Program at the University of Texas at Dallas.

Andy is Board Certified in Oil, Gas and Mineral Law by the Texas Board of Legal Specialization.


  • Represented numerous publicly traded, private, and national oil and gas companies in their global acquisition, divestment, trade, and merger activities

  • Assisted 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

  • Negotiated and drafted numerous host government contracts, including production sharing, concession, service and joint venture contracts

  • Negotiated and drafted numerous 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, and unitization agreements

  • Represented clients in infrastructure projects including oil and gas development projects, pipelines, and LNG projects
  • Counseled host governments and oil and gas companies in the development and preparation of legal and contractual regimes
  • Advised clients in arbitrations as an advocate and expert witness, and served as an arbitrator

  • Prepared and counseled clients on unitization and border disputes
  • Assisted client growth in the upstream and downstream sector

Prior Experience

  • Worked for nearly 20 years for Sun Oil Company and its successor, Oryx Energy Company. During this period, worked on projects in more than 40 countries. 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.


  • Legacy Award, Association of International Petroleum Negotiators; 2017

  • Chambers Global by Chambers & Partners (Energy: Oil & Gas (Transactional)); 2011, 2014-2018

  • Chambers Latin America by Chambers & Partners (Energy & Natural Resources); 2018-2019

  • Chambers USA by Chambers & Partners (Energy: Oil & Gas (Transactional)); 2010-2018

  • Dallas Energy Law, Natural Resources Law "Lawyer of the Year," The Best Lawyers in America© by Woodward/White Inc.; 2015; 2017; 2019

  • “Recommended Attorney,” The Legal 500 US by Legalease (Industry Focus: Energy: Transactions: Oil and Gas); 2015-2018

  • The Best Lawyers in America® by Woodward/White Inc. (Energy Law, Natural Resources Law, Oil and Gas Law); 2005-2019

  • Texas Super Lawyers® by Thomson Reuters (Energy & Natural Resources, International); 2003-2018

  • Best Lawyers in Dallas (Energy & Natural Resources), D Magazine; 2017

  • President's Award, Association of International Petroleum Negotiators, 1999

  • Recipient, Pelzi Award "Trade of the Year," 1995

  • Member of the Year, Association of International Petroleum Negotiators, 1990, 1992, 1993

  • Who's Who Legal: Texas (Oil & Gas; Energy; Thought Leaders); 2007-2017
  • Top 100 Lawyers in Latin America by Latinvex; 2017, 2019
  • 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

Activities (Memberships/Affiliations)

  • 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