Roman Ronneburger

Hans Georg Helwig is a lawyer recognized by Best Lawyers in the practice area of Labor and Employment Law. Hans Georg practices law in Berlin, Germany Best Lawyers has recognized Hans Georg Helwig since 2021. The Best Lawyers recognition is based on a peer-review survey of lawyers in the same geographic region and legal practice area. The recognition reflects the professional regard in which Hans Georg Helwig is held by other lawyers.

Dr. Wolfram Müller is a German Patent Attorney based in Berlin with Patentanwaltskanzlei W. Müller , advising clients in Intellectual Property Law with a focus on the protection of technical innovations, patents, trademarks , and designs . Science and technology continue to shape technological progress and economic development. Effective protection of innovations requires both technical understanding and legal knowledge in order to accurately assess inventions, prepare patent applic...

Aldo Trentinaglia, born in Munich in 1982, completed basic studies in philosophy, logic and philosophy of science at the Ludwig Maximilian University in Munich on a scholarship from the Friedrich Ebert Foundation. Later followed law studies at the Bucerius Law School in Hamburg with a stay abroad in Sydney, Australia, as a scholarship holder of the German National Academic Foundation. He completed his legal clerkship at the Hanseatic Higher Regional Court. While working he completed his train...

Irene Schmid, born in Stuttgart in 1956, studied law in Berlin and Cambridge, England, where she obtained her Master of Laws in 1984. She has been working as a lawyer since 1988 – amongst others in major international law firms – and as a notary since 1996. From 2009 to 2012, she was President of the Berlin Bar Association. Irene Schmid is a partner with ZENK. Today, she focuses on advising national and international clients in all areas of real estate business law. She also assis...

Born in Munich in 1965, Dr. Markus Kelber studied law and worked as a research assistant at the University of Regensburg in 1987 after completing his apprenticeship as a carpenter. Dr. Kelber has been active as a lawyer in Berlin since 1996, working first for an employers’ association and then for the medium-sized local law firm Danckert Böx Meier. In 1998, he obtained his doctorate in constitutional law with Prof. Dr. Udo Steiner in Regensburg, with a thesis on the subject of &ldq...

Rainer Pietschmann Lawyer | Managing Partner Studied law at the Universities of Bochum and Bonn and at the University of Washington (Seattle, WA). Clerkship at the Court of Berlin. From 1989 to 1992 director of a German/ Italian trading company. From 1995 to 1997 Attorney (Partner) at Lauenroth & Partner (Berlin). Founded PIETSCHMANN Legal (Berlin) in 1997. Supervisory Board of Schrobsdorff Bau AG (Berlin). Main Areas of expertise Civil Construction Law, Real Estate Law, Public Procuremen...

Born in Brühl in 1965, Dr. Rolf Zeißig studied law in Bonn, Hamburg and Berlin. He was a research assistant at the Department of Labor and Social Law at the University of Potsdam and obtained a doctorate in labor law on the subject of “The Conservation of the Status Quo of Works Council Agreements in the Event of Termination”. Dr. Zeißig has worked as a lawyer since 1996 and as a specialist in labor law since 1999. He has been with ZENK since 2002. Dr. Zeißi...

Fabian Winters is a lawyer recognized by Best Lawyers in the practice areas of Public Law and Public Private Partnership. Fabian practices law in Berlin, Germany Best Lawyers has recognized Fabian Winters since 2025. The Best Lawyers recognition is based on a peer-review survey of lawyers in the same geographic region and legal practice area. The recognition reflects the professional regard in which Fabian Winters is held by other lawyers.

Jens-Uwe Hinder is a lawyer recognized by Best Lawyers in the practice areas of Corporate Law, Mergers and Acquisitions Law, Real Estate Law and Tax Law. Jens-Uwe practices law in Berlin, Germany Best Lawyers has recognized Jens-Uwe Hinder since 2017. The Best Lawyers recognition is based on a peer-review survey of lawyers in the same geographic region and legal practice area. The recognition reflects the professional regard in which Jens-Uwe Hinder is held by other lawyers.

Martin Hamer is a Partner in the Environmental Group in Germany. He focuses on environmental matters including soil and groundwater contamination, environmental permits, nature protection, waste management, mining and climate protection. Martin represents clients in complex permit procedures vis-à-vis public authorities, environmental liability litigation and public law contract negotiations. In addition, he advises on environmental and other regulatory matters in corporate and real es...