Job Title Category: Partner

  • Gregory E. Heltzer

    Gregory E. Heltzer

    People

    Gregory E. Heltzer

    Partner

    Washington, DC

    Areas of focus

    Greg Heltzer, recognized by The Legal 500, named a Super Lawyers Rising Star, and rated a Thomson Reuters Stand-Out Lawyer, has extensive experience counseling clients on antitrust matters, with particular focus on transactional antitrust matters and mergers and acquisitions. Greg has successfully defended mergers for ABC Supply, Baxter, Constellation Brands, DaVita, JAB Partners, Mars, Martin Marietta Materials, Motorola Solutions, Olam, TreeHouse Foods, Worthington Industries, and many private equity firms among others.

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    Results
    • Lockheed Martin in multiple acquisitions (aerospace/defense)
    • Constellation Brands in multiple transactions including the sale of 30+ brands to E. & J. Gallo, the sale of Svedka, the sale of several brands to The Wine Group, the sale of Nobilo Wine to E. & J. Gallo, and the acquisition of Sea Smoke
    • ABC Supply in its acquisition of Feldman Lumber, Rosen Materials, Wallboard Supply, and Coastal Roofing Supply (interiors and roofing)

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    Recognitions
    • Chambers USA, 2026
    • The Legal 500 US
    • Super Lawyers, Rising Star
    • Thomson Reuters, Stand-out Lawyer – independently rated lawyers

    Capabilities and industries
    Regional markets
    Community
    • American Bar Association, Antitrust Section
    Credentials
    Education
    • Georgetown University Law Center, JD, cum laude
    • Dartmouth College, AB
    Admissions
    • District of Columbia
    • Maryland
    Courts/Agencies
    • US District Court for the District of Columbia
  • Grégoire Andrieux

    Grégoire Andrieux

    People

    Grégoire Andrieux

    Partner
    Areas of focus

    Mergers and acquisitions

    Leveraged buyouts

    Cross-border private equity transactions

    Refinancings and divestitures

    Debt restructurings

    Grégoire Andrieux advises on mergers and acquisitions with a particular emphasis on leveraged buyouts and other complex private equity transactions.

    He represents private equity institutions, family shareholders and entrepreneurs in domestic and cross-border acquisitions, refinancings, divestitures, build-ups and debt restructurings.

    “Grégoire Andrieux is technical, commercial, and efficient in negotiation.”

    Legal 500 EMEA, 2026

    The Best Lawyers in France, 2026

    Chambers France, 2026

    Results
    Recognitions
    • Legal 500 EMEA, Leading Individual in France: Private Equity: LBO, 2022-2026
    • The Best Lawyers in France, Lawyer of the Year, Private Equity Law, 2026
    • Chambers France, Band 1 in Private Equity: Mid-Market, 2026
    • The Best Lawyers in France, Private Equity, Corporate Law and Mergers & Acquisitions, Private Equity Law, 2020-2026
    • Chambers Europe, Band 2 in France: Private Equity: Mid-market, 2022-2024
    • Mergermarket M&A Deals, Highlighted Individual, 2020
    Capabilities and industries
    Regional markets
    Community

    Head of the Paris office

    Credentials
    Education
    • The University of Texas at Austin, LLM
    • Paris 1 Panthéon-Sorbonne University, LLM, Business Law, cum laude
    • Nantes University, LLM, summa cum laude
    • Nantes University, LLB, cum laude
    Admissions
    • Paris
    • New York
    Languages
    • English
    • French
  • Britt Haxton

    Britt Haxton

    People

    Britt Haxton

    Partner

    Washington, DC

    Areas of focus

    Britt Haxton focuses her practice on international corporate tax matters. She advises clients on the new international tax provisions of the Tax Cuts and Jobs Act of 2017 (TCJA). Britt has substantial experience advising multinational corporations on post-acquisition integration strategies and implications of the GILTI regime, FDII, section 245A, and foreign tax credit planning under TCJA. She advises clients on the application of the participation exception under section 245A and the impact on repatriation strategies.

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    Results
    • Structured and managed the post-acquisition integration of 20 subsidiaries in 20 different countries to enable implementation of an integrated workforce
    • Provided advice and analysis regarding a multibillion-dollar separation of a multinational corporation into three separate publicly traded companies by means of tax-free stock dividends to shareholders

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    Recognitions
    • Legal 500 US, 2022
    • Super Lawyers Rising Stars, 2017 to 2021
    Capabilities and industries
    Regional markets
    Community
    • McDermott Lesbian, Gay, Bisexual and Transgender (LGBT) Diversity Committee
    • McDermott Associate Recruitment Committee
    • McDermott Pro Bono Committee
    Credentials
    Education
    • Georgetown University Law Center, JD, cum laude
    • Creighton University, BS, summa cum laude
    Admissions
    • District of Columbia
  • Debra A. Harrison

    Debra A. Harrison

    People

    Debra A. Harrison

    Partner

    Washington, DC

    Areas of focus

    As a member of the Corporate Department, Debra focuses her practice on renewable energy transactions, general corporate matters, franchising, licensing and distribution matters, as well as other business growth strategies.

    Debra’s corporate practice includes counseling clients, both publicly and privately held, on transactions related to capital formation, mergers and acquisitions, reorganizations, brand extension programs, joint ventures and strategic alliances in a variety of industries. She has extensive experience advising clients on renewable energy transactions, including the structuring, development and financing of renewable projects throughout North America and Europe. Debra has served as counsel for major investment banking clients, large developers, sponsors, utilities, and other lenders and investors in the development, implementation, acquisition, structuring and financing of renewable assets, including the negotiation of acquisition and financing documents (including tax equity and back leverage), strategic investments, PPAs, EPCs, and various agreements related to state and local incentives and renewable energy credits.

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    Results
    • Representing a leading US utility in the acquisition of two large wind energy projects under development and in the negotiation of multiple power purchase agreements relating to utility-scale wind projects
    • Representing a leading US utility in the acquisition of a large solar + storage facility under development
    • Representing a leading French apparel company in its expansion into the United States

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    Recognitions
    • Best Lawyers in America, Energy Law, 2026-2027
    • Legal 500 US, Recommended, 2015, 2017, 2021-2024
    • District of Columbia Courts, Capital Pro Bono Honor Roll, 2023
    • IFLR1000 Energy & Infrastructure 2015 Guide , Renewable Energy, Latin America
    Capabilities and industries
    Regional markets
    Community
    • National Association of Women Business Owners, former counsel
    • DC Bar Landlord Tenant Resource Center, firm coordinator
    • Children’s Science Center (NOVA), founding member
    Credentials
    Education
    • George Washington University Law School, JD
    • The Ohio State University, BA
    Admissions
    • District of Columbia
    • Maryland
    • Virginia
  • Travis Harrison

    Travis Harrison

    People

    Travis Harrison

    Partner

    Washington, DC

    Areas of focus

    Travis Harrison focuses his practice on counseling individuals and families with regard to their wealth management and estate planning needs. He advises clients on the preparation of wills, trust agreements, powers of attorney, advance healthcare directives and prenuptial agreements. He provides legal counsel in connection with probating estates, analyzing estate and gift taxation matters, advising fiduciaries in connection with the administration and investment of estate and trust assets, and forming partnerships and limited liability companies.

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    Results
    Recognitions
    • Best Lawyers in America, Trusts and Estates, 2023-2027
    Capabilities and industries
    Regional markets
    Community
    Credentials
    Education
    • University of Virginia School of Law, JD
    • Brigham Young University, BA, cum laude
    Admissions
    • District of Columbia
    • Maryland
    • Virginia
  • Kevin Hall

    Kevin Hall

    People

    Kevin Hall

    Partner
    Areas of focus

    Kevin Hall concentrates his practice on the tax aspects of complex domestic and cross-border transactions and the formation and operation of private equity funds and family offices. Kevin has extensive experience advising buyers, sellers, and joint venture partners on the tax aspects of complex transactions, with a special emphasis on transactions involving healthcare companies. He also regularly represents fund sponsors in structuring funds across a variety of strategies, including buyout, real estate, credit, growth equity and venture capital, co-investment, fund-of-funds, and secondaries.
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    Results
    Recognitions
    • The Best Lawyers in America, Lawyer of the Year in Miami: Tax Law, 2027
    • Best Lawyers in America, Tax Law, 2026-2027
    Capabilities and industries
    Regional markets
    Community
    • University of Miami School Of Law, adjunct professor
    • Florida Law Review, member
    • Tax Law Review, Graduate Editor, 2013 – 2014
    Credentials
    Education
    • New York University, LLM
    • University of Florida, JD, summa cum laude
    • Wake Forest University, MS
    • Wake Forest University, BS
    Admissions
    • District of Columbia
    • Florida
  • Steffen Woitz, LL.M.

    Steffen Woitz, LL.M.

    People

    Steffen Woitz, LL.M. (Wellington)

    Partner
    Areas of focus

    Steffen Woitz advises German and international clients on intellectual property, antitrust and competition law issues.

    He has in-depth litigation experience in all major German courts and assists clients in cross-border disputes and transactions. He represents German and international clients in infringement and other contentious matters relating to trademarks, patents, unfair competition and antitrust law as well as in other commercial law matters. In addition, Steffen is active in the area of cartel damages, having successfully defended clients against cartel damages claims brought by competitors and commercial customers.

    Steffen advises clients on cooperation and distribution agreements from a German civil law and an antitrust perspective. He has deep knowledge in the area of competition law compliance. He also advises on a broad range of intellectual property and antitrust issues in connection to national and international mergers & acquisitions.

    Results

    Steffen advised:

    • A leading South Korean manufacturer of solar modules in cross-border arbitration
    • The operators of world-leading and well-known health resorts in a trademark, copyright, and unfair trade law dispute.
    • A famous Bavarian brewery in trademark infringement litigation

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    Recognitions
    • Handelsblatt/Best Lawyers™, Germany: Litigation, 2027
    • Handelsblatt/Best Lawyers™, Germany: Litigation and Intellectual Property Law, 2021-2025
    • The Legal 500 EMEA, Recommended, Germany: Patent Law and Dispute Resolution, 2024
    • The Legal 500 EMEA, Recommended, Germany: Patent Law, 2021-2023
    • The Legal 500 EMEA, Recommended, Germany: Dispute Resolution, 2021
    Capabilities and industries
    Regional markets
    Community
    • AmCham Germany NextGen
    Credentials
    Education
    • Court of Appeal, Berlin, Second State Exam
    • Victoria University of Wellington, LL.M.
    • Free University of Berlin, First State Exam
    Admissions
    • Germany
    Languages
    • German
    • English
    • French
    • Russian
  • Llewelyn M. Engel

    Llewelyn M. Engel

    People

    Llewelyn M. Engel

    Partner

    Washington, DC

    Areas of focus

    Llewelyn Engel focuses her practice on government investigations, government contracts, lobbying, political contributions, government ethics, and public policy matters. Llewelyn has successfully represented clients in high-profile investigations by the Department of Justice and Congress that entail significant legal, political and reputational risks. Llewelyn is experienced in navigating the political vetting process and has helped a high-profile client nominated by the President undergo the confirmation process.

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    Results
    Recognitions
    • District of Columbia Courts, Capital Pro Bono Honor Roll, 2023
    • Legal 500 US, Recommended Lawyer: Government Contracts, 2024-2025
    Capabilities and industries
    Regional markets
    Community
    Credentials
    Education
    • Georgetown University Law Center, JD
    • Colgate University, BA, magna cum laude
    Admissions
    • Virginia
    • District of Columbia
    Languages
    • English
  • Jonathan Ende

    Jonathan Ende

    People

    Jonathan Ende

    Partner

    Washington, DC

    Areas of focus

    Jonathan (Jon) Ende counsels clients on complex privacy, cybersecurity, and artificial intelligence (AI) questions, helping organizations navigate rapidly evolving regulatory landscapes.

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    Results
    • Assisted numerous companies with global ground-up construction of privacy compliance programs for US state privacy laws in California
    • Counseled many companies on cookie litigation and enforcement risk and maximizing value of online data collection technologies
    • Supported companies across the automotive ecosystem with complex privacy and data security compliance issues, including connected vehicle services, driver assistance systems, mobile application development, consumer insurance programs, and others

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    Recognitions
    • District of Columbia Courts, Capital Pro Bono Honor Roll, 2023
    Capabilities and industries
    Regional markets
    Community
    Credentials
    Education
    • University of Virginia School of Law, JD
    • University of Virginia, BA, Economics
    Admissions
    • District of Columbia
    • Virginia
    Languages
    • English
    • Japanese
  • Joshua M. Ellenberg

    Joshua M. Ellenberg

    People

    Joshua M. Ellenberg

    Partner

    Washington, DC

    Areas of focus

    Joshua (Josh) M. Ellenberg focuses his practice on US and international tax matters.

    Josh was previously a judicial intern for the Honorable Shirley M. Watts of the Maryland Court of Special Appeals and for the Honorable Rudolph Contreras of the US District Court for the District of Columbia. While in law school, Josh earned a CALI Award for academic excellence and was recognized for “truly extraordinary academic performance.” He was also a member of the Georgetown Journal of Law & Public Policy.

    Results
    Recognitions
    • Best Lawyers: Ones to Watch in America, Tax Law, 2024-2027
    • District of Columbia Courts, Capital Pro Bono Honor Roll, 2023
    Capabilities and industries
    Regional markets
    Community
    Credentials
    Education
    • Georgetown University Law Center, JD, magna cum laude
    • Ner Israel Rabbinical College, MTL
    • Ner Israel Rabbinical College, BTL
    Admissions
    • Maryland
    • District of Columbia