Roszel C. Thomsen II

International Trade and Investment Counsel for Technology Companies

Roszel C. Thomsen II

P: (410) 539-2596
F: (410) 783-0710
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A.B., Harvard College
J.D., American University
M.A., American University

District of Columbia

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Roszel C. Thomsen II concentrates on international trade and investment law, with emphasis on representing information technology and life sciences companies and their trade associations in regulatory, legislative and enforcement matters.

Mr. Thomsen is listed in The Best Lawyers in America, a co-author of United States Export Controls, and an editor of the Journal of Internet Law. He is a member of the Steering Committee on the Federal Bureau of Investigation’s Information Technology Study Group, a member of the Commerce Department, Bureau of Industry and Security’s Information Systems Technical Advisory Committee, and has participated twice as an Industry Representative on the United States Delegation to the Wassenaar Arrangement in Vienna, Austria.

Recent Matters

  • Counseled aerospace companies in jurisdiction, classification and licensing matters before the State Department’s Office of Defense Trade Controls
  • Advised computer and software companies in enforcement matters involving exports to China before the Commerce Department’s Bureau of Industry and Security
  • Represented telecommunications and medical equipment companies in connection with trade sanctions administered by the Treasury Department’s Office of Foreign Assets Control
  • Counseled a trade association in obtaining relaxation of export controls on cryptography
  • Advised a trade association regarding relaxation of international export controls on software for the design of semiconductors and integrated circuits
  • Represented companies with respect to reviews by the Committee on Foreign Investment in the United States, including related export and security clearance issue


  • American Bar Association
  • District of Columbia Bar
  • Maryland State Bar Association


  • Testimonials

    Export compliance law is not an area of practice that global companies should just dabble in ..... and neither should their outside counsel. A combination of experience, expertise and practical advice is critical in guiding companies through the rigorous landscape of export control. Roz Thomsen and the team at Thomsen & Burke have not only proven themselves to be professionals of the highest degree, they have become relied upon strategic partners of our organization.
    ~ Daniel S. Follis, Jr.
    Vice President, General Counsel & Secretary, Compuware Corporation

    I can always count on Roz Thomsen for informed, yet pragmatic advice in the complex area of export compliance. With Roz, I don't get recitations of generalities that I already know, but rather solutions to the problems my company is facing. I highly recommend him.
    ~ Rob Lindquist
    Vice President, Worldwide Legal Department Ingram Micro Inc.

    Roszel Thomsen of Thomsen & Burke has provided expert advice to our team regarding export control issues for many years. He is a true business partner in every sense of the word: responsive, knowledgeable, practical, and great to work with. His professionalism and integrity consistently enable him to establish credibility with both our clients and the government agencies with whom we deal.
    ~ David Farrell
    Vice president, Chief Compliance Officer Sun Microsystems, Inc.