Mark Dorff is a partner in Brown Rudnick’s London office. He is Chair of the Firm’s International Corporate Group and Co-Chair of the Firm's Global Life Sciences team.

Mark represents entrepreneurs, private and public companies and a broad range of investors including family offices and private equity investors in complex transactions around the world.

Mark is Chairman Emeritus of the Law Firm Network, a strong association of independent law firms from all over the world. The Network forms a key part of Brown Rudnick’s extended global network.

Mark's practice is regularly ranked highly and recognized in industry publications. 



Negotiating on behalf of buyers, sellers and management teams on numerous cross-border M&A, private equity and buy-out transactions involving the acquisition or sale of companies in the US, the UK, Europe and around the world.

Advising family offices and other private family investors on structuring and executing a broad range of transactions around the world including M&A deals, investments in property and natural resources, establishing funds and investments in funds and other bespoke and structured investments.

Representing both investors and investee companies in connection with numerous venture capital and growth equity transactions in the US, the UK, Europe and around the world.

Representing international companies, investment banks and investors on US aspects of global securities offerings including in connection with Rule 144A and other private placements in the United States.

Advising management teams and boards of directors on a wide range of corporate governance and strategic matters.

Structuring a broad range of complex licensing and strategic partnership transactions in the US, the UK, Europe and around the world on behalf of numerous international technology and manufacturing businesses.


Boston University – J.D., 1994
Ohio State University – B.S., cum laude, 1991

Bar Admissions

England and Wales
Speaking Engagements
Mark is a regular speaker at conferences and programmes around the world on a broad range of topics within his areas of experience.
Awards and Honors
Mark is ranked by Chambers & Partners UK 2020 for Private Equity: Venture Capital Investment. He was also ranked in the 2019 and 2018 editions, where clients describe Mark as a "tough, commercial negotiator" who is "very helpful in stalemate situations," where his "flexible but firm style comes to the fore." He is described as "a seasoned performer in investment work, specialising in acting for entrepreneurs, corporate clients and investors in venture capital and growth equity matters."
Mark is ranked by The Legal 500 UK 2020 as a Leading Individual for Venture Capital, and as a Recommended Lawyer for M&A Smaller Deals up to £50m. He was also ranked in the 2018 and 2017 editions as a Recommended Lawyer for M&A and Venture Capital, where the Brown Rudnick team is described as "always available and approachable" and providing a "high level of service."