In June 2025, Kramer Levin merged with Herbert Smith Freehills to form Herbert Smith Freehills Kramer, a global law firm with a highly regarded business immigration practice. Under the leadership of Mark Koestler and Matthew Dunn, based in the firm’s New York office, the practice advises clients on all aspects of US immigration across financial services, advertising, arts and entertainment, fashion, and healthcare industry sectors, including professional, managerial, and extraordinary ability visa petitions, and represents companies in federal enforcement actions before US Immigration and Customs Enforcement, the US Department of Labor’s Wage and Hour Division, and the Department of Justice. Koestler and Dunn help a diverse group of clients navigate complex immigration laws and policies, providing immigration counsel in connection with mergers, acquisitions, and spin-off transactions, and ensuring compliance with US immigration law. They are supported by New York-based Scott Gorski, who advises multinational corporations, startups, and nonprofits seeking immigrant and nonimmigrant visas on behalf of their employees, and who guides clients in hiring, transferring, and retaining foreign talent.
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Immigration
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Partner, New York

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Matthew, one of the country’s leading immigration lawyers, advises and represents a diverse group of clients, including banks, global financial services companies, technology and business consultancies, advertising agencies, health care institutions, sports and entertainment organizations, and corporations of all sizes, in the hiring, transfer and retention of foreign national executives, managers, professionals, athletes and performing artists in the United States. Matt works with these companies and organizations to develop the optimal workforce planning and mobility strategies to meet their specific national or global needs, advising them on navigating the complex and often restrictive framework of immigration laws and policies in the United States.

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Testimonials

Collated independently by Legal 500 research team.

  • 'I began working with the HSFK team in 2013; however, our organization had a partnership with HSFK before that. Since then, I have come to trust them completely due to their strong work ethic, integrity, and the guidance they provide. Our organization relies heavily on their expertise, and to this day, we still use them as our firm for day-to-day inquiries and visa petitions. We won't even consider working with another firm. They keep us informed and guide us to help make important decisions.'
  • 'The HSFK team is made up of Mark Koestler and Allison Gray, our trusted experts with whom we have been collaborating for over a decade. Their reliability, honesty, strong work ethic, and outstanding collaboration skills are just a few of the reasons we value their recommendations and expertise. Our organization greatly appreciates the contributions they make.'