Thomas Sauermilch concentrates in cross-border mergers and acquisitions, joint ventures and other complex cross-border corporate/commercial transactions for major multinational corporations, private equity funds and their portfolio companies and medium-sized businesses. He also advises clients in corporate governance and compliance matters. He has led transactions in a wide range of sectors, including aerospace and avionics, automotive industries, chemicals, energy, engineering, manufacturing, media, medical devices and scientific instruments, metals and natural resources, packaging, pharmaceuticals, semiconductor equipment, software, technology and trading in North and South America, Europe and Asia. He has been recognized over many years by leading legal directories and nominated as Lawyer of the Year by The Deal (2018) and Dealmaker of the Year by M&A Advisor (2017). He has also been recognized as a BTI Client Service All-Star 2020 (BTI Consulting Group) and led the McDermott team winning the 2020 M&A Advisor Deal of the Year Awards in two categories (Cross-Border Deal of the Year and Materials Deal of the Year; $500million to $1billion).

Thomas is a former chair of the Firm’s Global M&A Practice.


  • Represented a leading specialty chemicals company in its $3.8 billion acquisition of a worldwide specialty and additives business, its $1.6 billion acquisition of pharmaceutical manufacturing operations and strategic alliance with a major US based pharmaceutical company, its $2 billion acquisition of the worldwide personal care business of and strategic alliance with a leading US chemicals company and numerous other acquisitions, divestitures and joint ventures

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  • BTI Client Service All-Star, 2020
  • Nominated as Lawyer of the Year by The Deal, 2018
  • Nominated for Dealmaker of the Year by M&A Advisor with respect to Evonik’s $3.8 billion acquisition of the global performance materials division of Air Products and Chemicals, 2017

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  • American Bar Association
  • American Council on Germany
  • International Bar Association


Fordham University School of Law, JD, 1988
Fletcher School of Law and Diplomacy, MALD, 1985
Indiana University Maurer School of Law, LLM, 1981
University of Kiel, Staatsexamen, 1983

New York

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Thomas Sauermilch

Insights & Events / Media

Virtual Event Series / McDermott Event / January 21 – February 4, 2021

International Legal Highlights / January 14, 2021

M&A Review, Volume 2, 2020 / September 16, 2020

International News / September 2020

Publications / April 24, 2020

Osaka and Tokyo, Japan / McDermott Event / January 21 and 22, 2020

Tel Aviv, Israel / McDermott Event / November 20, 2019

Tokyo, Japan / McDermott Event / January 30, 2019

Tokyo, Japan / McDermott Event / January 24 - 25, 2018

Tokyo, Japan / McDermott Event / January 25 - 26, 2017