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The team of the law firm Trebeck & von Broich has been working closely together for many years and some of them already know each other from their joint study days at the University of Cologne. Prior to founding Trebeck & von Broich, all attorneys worked for leading labor and employment law firms. There, they not only implemented various labor and employment law restructurings together, but also sharpened their individual consulting profiles. As a result, the attorneys have developed over the years a perfectly attuned teamwork, which enables them not only to provide ongoing labor and employment law advice, but also to provide labor and employment law support, operational support and implementation for large and highly complex projects within a short period of time.

Dr Joachim Trebeck, LL.M.

Attorney – Certified lawyer for labor law


Joachim Trebeck advises clients in all aspects of employment law, with a focus on corporate co-determination, collective bargaining law and transactional employment law. In addition, litigation is one of the main areas of consulting. Joachim Trebeck also has many years of experience in project management and the supervision of complex restructuring processes, both nationally and internationally.


Joachim Trebeck received his doctorate at the University of Cologne with a thesis on collectively agreed age limits. In addition to his work as a lawyer, he publishes numerous specialist publications (inter alia, Personal-Lexikon C.H. Beck.) and gives lectures and training in the field of labor law. The magazine JUVE, as well as the manual Legal 500 recommend him as “very well-versed” and “entrepreneurial restructuring expert”. In addition, the law magazin JUVE ranked him among the leading names in employment law up to 40 years in 2017-2019.

Stefan von Broich

Attorney – Certified lawyer for labor law


Stefan von Broich advises medium-sized companies, large corporations and executives on all issues of individual and collective employment law. In addition to the labor law support of day-to-day operations, the work-related supervision and implementation of complex operational and inter-company restructuring and reorganization, including the necessary negotiations with company and collective bargaining parties in this context, form a focus of his work.


In addition to his legal work, Stefan von Broich, who gained his first lawyer experience in a law firm in Dusseldorf, is a regular tutor in lectures and training on various topics of employment law. Like Joachim Trebeck, he is co-author of the Personal-Lexikon C.H. Beck. Stefan von Broich is also recommended by the law magazines JUVE and Legal 500 and praised, among other things, for his “great economic understanding”.

Dr Jeremy Bister

Attorney – Certified lawyer for labor law


Jeremy Bister advises companies and executives on all individual and collective labor and employement law issues. In addition to the classic permanent advice on labor and employment law, his work focuses on the support of transformation and restructuring projects in labor and employment law. Furthermore, Jeremy Bister specializes in advising on labor and employment law issues in connection with company transactions and transfers of businesses as well as representing companies and executives in employment law disputes.


Jeremy Bister studied at the University of Cologne, where he also received his doctorate. He completed his legal clerkship at the Regional Court of Cologne with stages in New York before beginning his legal profession in 2011.  Before joining Trebeck & von Broich, Jeremy Bister worked for several years at the labor and employment law boutique KLIEMT.Arbeitsrecht as well as for the law firm Seitz specializing in labor and employment law. In addition to his work as a lawyer, Jeremy Bister holds lectures and training courses on labor and employment law topics and is co-author of the practice handbook on restructuring law by Theiselmann.

Dr. Ingrid Kohlmann

Attorney – Certified lawyer for labor law


Ingrid Kohlmann advises large and medium-sized companies in all issues regarding collective and individual labor and employment law. She has particular experience in the labor and employment law implementation of extensive restructuring measures and M&A projects as well as in litigation in all instances of the labour courts. Other main areas of consulting are corporate co-determination and company pension schemes.

Ingrid Kohlmann studied at the University of Cologne, where she also received her doctorate with a thesis on international private law. Before joining Trebeck & von Broich as a partner, Ingrid Kohlmann worked for the Insurance Company Gothaer as an in-house lawyer for about one year. Prior to that, she gained more than 11 years of professional experience as a lawyer in labor and employment law at the renowned commercial law firm Kümmerlein Rechtsanwälte & Notare. 

Andrea Klein

Of Counsel
Attorney – Certified lawyer for labor law


Andrea Klein advises and represents clients in all areas of labor and employment law. She has many years of experience in individual and collective employment law, has provided legal advice on employment law for major national and international projects and has conducted numerous negotiations with works councils and collective bargaining parties. In addition to advising during restructurings and supporting the day-to-day business, she also specializes in litigation.


Andrea Klein is currently working as a legal expert for two Bavarian employers’ associations in the chemical and plastics sector in Munich. Prior to this, she was employed in a medium-sized law firm in Cologne for several years specializing in employment law.


Andrea Klein holds lectures and trainings on various topics of employment law on a regular basis.

Dr Kristina Arzberger



Dr. Kristina Arzberger advises international and national companies on collective and individual labor law. Her main practice areas are advising on labour law restructuring, advising on the establishment and termination of employment relationships, as well as issues of collective bargaining and works constitution law.


Prior to joining Trebeck & von Broich, Kristina Arzberger worked in a medium-sized law firm in Cologne specializing in particular in labour law.


After completing her studies at the University of Bonn, she worked as a research assistant at the Institute for Labour Law and Social Security Law (Chair of Professor Thüsing, LL.M. (Harvard)) at the University of Bonn and was awarded a doctorate (Dr. iur.) with her dissertation ”Dreiseitige Vereinbarungen – Vereinbarungen zwischen Arbeitgeber, Gewerkschaft und Betriebsrat“.

Dr. Marc Reuter



Marc Reuter advises clients in all areas of German and European individual and collective employment law. He specializes in employment contract and termination law as well as in the support of labor law restructurings. He also has experience in, inter alia, company pension law, employee data protection law and compensation law in the financial services sector. Additionally, he advises on national and international transactions.


Prior to joining Trebeck & von Broich, Marc Reuter worked as a lawyer in the employment and pensions team of the international law firm Linklaters in Düsseldorf.


After attending the Cologne School of Journalism and studying at the University of Cologne, Marc Reuter worked there as a research assistant at the Institute for German and European Labor and Social Law under Professor Dr. Dr. h.c. Ulrich Preis. Marc Reuter received his doctorate with his dissertation on “Ghettorenten” (“Ghetto Pensions”), which focused on legal history and methodology. The faculty of law at the University of Cologne awarded the thesis its faculty prize.


Marc Reuter is the author of various publications.

Kathrin Jansen



Kathrin Jansen advises and represents clients in all matters of individual and collective employment law. She advises companies of all sizes from the establishment to the termination of employment relationships. In addition to providing employment law support for day-to-day operations, she also focuses on providing employment law advice on complex operational restructuring measures, including the negotiations with the parties to the company required in this context, as well as representing clients in labor court proceedings.
Kathrin Jansen studied at the Ruprecht Karls University in Heidelberg. Prior to joining Trebeck & von Broich, she worked for Seitz, a business law firm specializing in employment law, and for Handelsverband Aachen-Düren-Köln e.V., which means that she is very familiar with the particularities of advising retail companies on employment law.

Johannes Klefisch

Of Counsel

Certified lawyer for insolvency law 

Certified lawyer for commercial and corporate law


Since his admission in 1985, he has handled more than 2200 insolvency proceedings as well as approximately 1100 out-of-court and court settlements within the scope of company reorganizations for legal, commercial and non-commercial persons.


After the introduction of the ESUG, he is primarily active in the area of company restructurings and restructuring as well as in corporate and insolvency law consulting for companies, shareholders, managing directors, etc., also in self-administration.


Lectures and publications on the liability of tax advisors in the event of client insolvency, on the restructuring of legal and natural persons, on the granting of capital-replacing loans and the liability of shareholders/managing directors in the event of insolvency, as well as on problems of insolvency tax law.


Lecturer for the DeutscheAnwaltAkademie, the DAV Working Group on Insolvency Law and Restructuring, the Verband der Insolvenzverwalter Deutschland e.V. (German Association of Insolvency Administrators). (VID), IHK Aachen and Verein für Insolvenzwesen Köln e.V. (Cologne Insolvency Association).