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.
Legal 500 Editorial commentary
Accolades
Client satisfaction: Billing & efficiency
Client satisfaction: Sector knowledge
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.'
Lawyers
Leading partners
The strongest partners in their field, leading on market-leading deals and endorsed by peers and clients alike.
Next Generation Partners
Junior partners with significant recognition from clients and peers in the market and key roles on multiple matters.
Practice head
Mark Koestler; Matthew Dunn
Other key lawyers
Scott Gorski; Allison Gray; Melissa Drennan