sports and association law.

range of consulting services.


employment contract | termination.

The employment relationship is a defining legal relationship for every company. Errors and disruptions in this legal relationship can give rise to significant negative consequences. As a result, employment contracts, but also their termination, are of great importance for every company.

subject areas.

  • Employment contracts
  • Termination and settlement agreements
  • Terminations and termination agreements
  • Defending unfair dismissal suits


  • Preparing and reviewing/revising employment contracts
  • Preparing supplemental agreements for employment contracts (company car regulations, bonus and target agreements, commission agreements, agreements for the use of communication devices, or BYOD)
  • Strategic consulting for the purpose of terminating employment relationships
  • Creating termination notices and counsel on the appropriate participation of the works council, as well as within the framework of agency assent procedures
Prof. Dr. Andreas Katzer
  • Partner | Lawyer, M.I.L (Lund)

works constitution and collective bargaining law.

With multidisciplinary engagement and closely involved IT expertise, we offer our clients full support for all collective bargaining law questions and structures.

subject areas.

  • Co-determination rights of the works council
  • Works council elections
  • (In-house) collective bargaining agreements and operational regulations
  • Work environment 4.0
  • Data protection and employee rights (monitoring, utilizing evidence at the time of termination)


  • Consulting on all works constitution legal questions
  • Creating works agreements and (in-house) collective bargaining agreements
  • Negotiations with works councils and unions
  • Representation in disputed cases before the labor court and the conciliation board

employing outside personnel | hiring out employees.

Misjudgments in employing outside personnel can have particularly negative consequences for companies. We ensure expert development of all legal relationships with subcontractors, freelance employees, and with regard to the subject of hiring out employees.

subject areas.

  • Freelance work and fictitious self-employment
  • (fictitious) contracts for work (fictitious) service contracts and impermissible hiring out of employees


  • Creating contracts and approaches
  • Review of social insurance law status
  • Conducting status determination proceedings, including subsequent appeal and court proceedings
  • Applying for permits according to the German Law on Temporary Employment (AÜG)
  • Counsel and implementation in cases of permissible hiring out of employees
  • Delimitation of the various forms of employing outside personnel in national and international contexts
Prof. Dr. Andreas Katzer
  • Partner | Lawyer, M.I.L (Lund)

social insurance law | status determination.

Sonntag & Partner has remarkable expertise in all social insurance law questions within established multidisciplinary teams. We also advise and represent our clients in particularly complex factual circumstances.

subject areas.

  • Status assessment
  • Company audits
  • Social insurance contributions for artists
  • Pensions
  • Social insurance exemptions for managers


  • Counsel and external representation
  • Representation towards social insurance carriers and other regulatory authorities
  • Conducting application and appeal proceedings
  • Reviews of social insurance status under the law
  • Evaluation of contribution obligations within the scope of social contributions for artists
  • Providing support in the course of company audits by pension insurance carriers, including a subsequent appeal and proceedings before the social courts
Prof. Dr. Andreas Katzer
  • Partner | Lawyer, M.I.L (Lund)

representation before the labor courts.

We comprehensively represent our clients in all labor court proceedings in all instances.

subject areas.

  • Disputed terminations of employment relationships
  • Disputed (payment) claims arising from employment relationships
  • Contested resolution of disputes under works constitution law
  • Proceedings for/against boards of directors and managers


  • Attending scheduled court dates in all instances throughout Germany
  • Evaluation of the prospects for success for lawsuits and appeals
  • Judgment proceedings
  • Labor court proceedings
  • Interim legal protection
  • Appellate proceedings (complaint, appeal, points of law)
Prof. Dr. Andreas Katzer
  • Partner | Lawyer, M.I.L (Lund)

employment agreements.

We advise our clients in the formulation of employment agreements for managers and governing bodies in accord with their interests.


  • Evaluating and drafting employment agreements for managers and governing bodies
  • Guidance about and organization of remuneration models/ management participation models
  • Counsel on the position and duties of managers/ governing bodes
  • Consulting on special corporate law topics in the employment agreement
  • Effectiveness of prohibitions on competition
  • Pension commitments
Martin Jost
  • Lawyer

termination | removal.

Our specialist attorneys advise companies and managers/ governing bodies in terminating mandates, in the case of terminations, and cancellation proceedings.


  • Counsel and support in terminating the mandate
  • Preparing termination letters,
  • Entwurf und Verhandlung von Aufhebungsvereinbarungen
  • Vorbereitung der Gremienbeschlüsse
  • Vertretung im gerichtlichen Verfahren
Prof. Dr. Andreas Katzer
  • Partner | Lawyer, M.I.L (Lund)

Wir verzahnen wirtschaftliche, steuerliche und rechtliche Aspekte und beraten fachübergreifend und auf Augenhöhe.

Wir begleiten große Familienvermögen, um langfristige Werte über Generationen zu bewahren.

Wir bieten maßgeschneiderte, praktikable Lösungen zu IT-Compliance, Digitalisierung und IT-Projektmanagement.

Wir beraten, bewerten und prüfen – national, aber auch international als unabhängiger MOORE-Netzwerkpartner.