Jeffrey M. Wiesen

Member Emeritus vCard


  • Yale University (JD, 1970)
  • Massachusetts Institute of Technology (BS, Economics, 1967)

Bar Admissions

  • Massachusetts

Jeff is the former Chair of Mintz Levin's Life Sciences Practice. He served as President and Chief Executive Officer of the firm from 1994 to 1996. Jeff has been an active participant and leader in the biotechnology industry since its inception in the late 1970s. He was involved in the formation of some of the earliest companies, and the structuring and negotiation of some of the industry’s earliest strategic alliances, venture financings, and public offerings, and has led Mintz Levin’s Life Sciences group to become one of the largest and best-known in the country.

His clients range in size from newly formed start-up ventures to substantial public companies. He assists these companies with a range of transactions, both domestic and international, including private and public finance, mergers and acquisitions, strategic alliances and joint ventures, and technology transfer and cross-transfer agreements, as well as providing general legal advice, and he has successfully structured, coordinated, and negotiated technology-based transactions with numerous worldwide pharmaceutical and chemical companies. His clients often think of him as an extra member of the executive management team.

Jeff is a frequent lecturer for the Biotechnology Industry Organization, the American Law Institute, and the Massachusetts Continuing Legal Education Foundation, as well as at numerous symposia on biotechnology strategic alliances.

Recognitions & Awards

  • Chambers USA: Massachusetts – Corporate/Mergers & Acquisitions (2004 – 2017)
  • Chambers USA: Nationwide – Life Sciences: Corporate/Commercial (2007 – 2017)
  • Best Lawyers in America: Biotechnology Law, Corporate Law, Mergers & Acquisitions Law (2006 – 2017)
  • Recommended by The Legal 500 United States for Healthcare: Life Sciences (2015 – 2017)
  • Finance & Transactional: Life Science Star, LMG Life Sciences (2012, 2014)
  • Licensing & Collaboration: Attorney of the Year (2013) and US Life Sciences Star (2014), LMG Life Sciences
  • Boston Best Lawyers Biotechnology Lawyer of the Year (2013)
  • Massachusetts Super Lawyers: Business/Corporate (2004 – 2015)
  • Martindale-Hubbell AV Preeminent  

Professional & Community Involvement

  • Past general counsel, Massachusetts Biotechnology Council
  • Member, Advisory Council of the Harvard-MIT Division of Health Sciences and Technology (HST)
  • Board member, HST Biomedical Enterprise Program
  • Board member, Biomedical Science Careers Program
  • Member, Licensing Executives Society
  • Member, American Bar Association
  • Member, Massachusetts Bar Association
  • Member, Boston Bar Association