Dr. Jan Streer is counsel in the Corporate & Securities practice of Mayer Brown´s Düsseldorf office. His practice focuses on advising national and international companies, banks and financial investors in transactional matters, in particular with regard to merger and acquisitions, restructurings and security offerings. Besides his transactional work, Jan is standing legal counsel to several German and international companies, advising them on complex corporate issues as well as commercial and trade law matters.

Prior to joining Mayer Brown in 2006, Jan worked as a legal clerk for another major international law firm. In addition to his law firm experience, he spent almost a year on two client secondments, thus gaining considerable in-house experience.

In addition to his native German, Jan is fluent in English.

Spoken Languages

  • German
  • English


  • Advising a medium-sized enterprise active in the paper industry in respect of its transformation into a European stock corporation (SE), the acquisition of various participations, its restructuring as well as the issuance of a high yield bond.
  • Advising a large German medical devices company on its acquisition of the global operations of a competing company.
  • Advising a major German bank and their shareholders on the sale of the bank within a tender process.
  • Advising a US orthopedics company on various M&A as well as corporate matters.
  • Advising a private equity fund on the acquisition of a medium-sized enterprise of the metal industry as well as on the granting of management participations.
  • Advising an international energy company on the sale of a German subsidiary in the metal industry, including a so-called vendor due diligence.


Doctor's Degree (PhD in law), University of Cologne, 2006

Second State Law Examination (bar exam)

Cologne, 2006

Legal Clerkship (Referendariat)

District Court of Cologne, 2004-2006

LLM, Master in International Business and Commercial Law, University of East Anglia, 2002-2003

First State Law Examination

Trier, 2002

University of Trier

Studies of Law and Business Administration, 1997-2002

University of Hagen

Studies of Law and Business Administration, 2000-2001


  • Cologne, Germany


  • Lecturer on international commercial law in the Master of Science (M.Sc.) in International Management program at Steinbeis-University, School of International Business and Entrepreneurship