Photo, Dr. Katharina Weiner

Dr. Katharina Weiner

Baker McKenzie Rechtsanwaltsgesellschaft mbH von Rechtsanwälten und Steuerberatern


Dr. Katharina Weiner is a certified specialist lawyer for public procurement law and Counsel in the Public Sector & Regulatory department in Düsseldorf as well as a member of the Global Reorganizations Group. Before joining Baker McKenzie in 2008, she worked in the area of public procurement law at the European Commission in Brussels and completed the Government Contracts Program at George Washington University Law School in Washington DC. She has been named as a recommended lawyer for the area of public procurement law by Who's Who Legal several times since 2014 and as a Next Generation Lawyer for the area of public procurement law by Legal 500 in 2017.

Practice Focus

Katharina specializes in transactional public law and advises global clients and the public sector on reorganizations, project developments and M&A transactions. With her focus on regulatory and public law aspects (e.g. sustainability, supply chain compliance and ESG/EHS), Katharina has extensive experience and expertise in structuring, implementing and managing cross-border reorganizations in highly regulated sectors (in particular healthcare, IT, infrastructure and transport as well as defense and security), where she regularly takes on the cross-sector coordination.

Katharina's practice also includes advising on subsidy and EU state aid law aspects, in particular in connection with investment projects in Germany. She advises on all phases of project development, from site selection and project structuring to the structuring of the legal framework for subsidies and the contractual implementation of the project.

In addition, Katharina focuses on supporting globally active companies as well as governments and state institutions with major projects affecting the public sector. She advises and represents bidders and contracting authorities in procurement and review proceedings.

Representative Legal Matters

  • Advising an international courier and logistics group on the restructuring of its European business following the acquisition, in particular with regard to regulatory aspects.
  • Advising HOCHTIEF on the spin-off and sale of the service solutions division to the SPIE Group and on the restructuring of the European business, in particular with regard to public procurement law aspects.
  • Advising Evonik on the sale of its methacrylates business for EUR 3 billion to funds advised by Advent International.
  • Advising Thales on the EUR 1.66 billion restructuring of its defense business (carve-out) in connection with the sale of its railroad business to Hitachi.
  • Advising a US-based global medical technology group on the restructuring of its divisions in Germany in preparation for the USD 1.65 billion global sale of one of these divisions.
  • Advising Accenture on the German regulatory part (in particular on public procurement law issues) of the EUR 1.1 billion acquisition of the umlaut Group.
  • Advising a private equity fund on the post-acquisition integration of a diagnostics company with respect to public law and regulatory compliance in Germany as part of a EUR 2 billion global transaction.
  • Advising a leading multinational technology company in relation to the planned establishment of a semiconductor production facility in Magdeburg with an investment volume of more than EUR 30 billion, in particular with regard to subsidy law aspects.
  • Advising and representing international pharmaceutical companies, medical device manufacturers and trading companies in connection with major procurement projects of the German Federal Government and the European Commission to deal with the COVID-19 pandemic.
  • Advising a European government and several European defense ministries on the national implementation of the Defense Procurement Directive 2009/81/EC and on the award of various major defense-related projects.
  • Advising several public clients at federal and state level on various procurement procedures in the IT sector, from the structuring of the procurement project through the implementation of the procurement procedure to the conclusion and execution of the contract.

Professional Honors

  • Lawyer of the next generation, Government Contracts, Legal 500 Germany 2017
  • Recognized lawyer, Government Contracts , Who’s Who Legal Germany 2014, 2015, 2016

Professional Associations and Memberships

  • American Bar Association - Member 
  • Deutscher Anwaltverein (DAV) - Member 
  • Deutsch-Amerikanische Juristen-Vereinigung - Member 
  • Forum Vergabe e.V. - Member


  • Germany (2008)


  • Certified specialist lawyer for public procurement law (Fachanwältin für Vergaberecht) (2022)
  • Higher Regional Court of Dusseldorf (Assessor Exam) (2008)
  • Ruhr-University Bochum (Dr. iur. summa cum laude) (2007)
  • Ruhr-University Bochum (Referendar Exam) (2003)


  • English
  • German

Previous Offices

  • Berlin

Co-author, § 21 Regulatory Areas, in: Kästle / Svernlöv (eds.), Legal Due Diligence in International M&A Transactions, Verlag C.H. Beck, 2022

Author, § 1 Grundsätze des Vergaberechts und § 22 Nachhaltigkeit im Beschaffungswesen, in: Gabriel/Krohn/Neun (eds.), Handbuch des Vergaberechts, Verlag C.H.Beck

Author, Vergaben im Sozialrecht, in: Willenbruch/Wieddekind (eds..), Vergaberecht Kompaktkommentar, Werner Verlag

Author, Sozialvergaben, in: Goede/Stoye/Stolz (eds.), Handbuch des Fachanwalts Vergaberecht, Werner Verlag

Co-author, Beschaffungsfragen und Public Private Partnerships (PPP) im Krankenhauswesen, in: Huster/Kaltenborn, Krankenhausrecht Handbuch

(on a regular basis), Author, literary guide, forum vergabe e.V.