Jan Dirk Heerma

Lawyer Partner

Sebastian Lutz-Bachmann is a top attorney recognized by Best Lawyers in the practice area(s) of Energy Law. Sebastian, who practices law in Berlin, Germany, has been recognized since 2026. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Sebastian is held by other top lawyers in the same geographic and legal practice area.

Lawyer Partner

Viviane Freifrau von Aretin is a top attorney recognized by Best Lawyers in the practice area(s) of Labor and Employment Law. Viviane Freifrau, who practices law in Berlin, Germany, has been recognized since 2023. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Viviane Freifrau is held by other top lawyers in the same geographic and legal practice area.

Christiane Huismans, born in 1966 in Telgte (Westphalia), studied law in Münster following her banking apprenticeship in Bremen and has been working as a lawyer since 1996. Since 2017, she has been offering support in conflict situations as a mediator. Christiane Huismans is a partner at ZENK.* Due to her many years of experience as a lawyer in insolvency administrator law firms, on the side of intensive support of the credit industry as well as in large international law firms, Christia...

Constanze Püschel is a top attorney recognized by Best Lawyers in the practice area(s) of Biotechnology Law and Life Sciences Practice. Constanze, who practices law in Berlin, Germany, has been recognized since 2024. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Constanze is held by other top lawyers in the same geographic and legal practice area.

Born in Duisburg in 1974, Dr. Kostja von Keitz studied law in Düsseldorf. He received his doctorate in European nature conservation and national administrative procedural law in 2005, with a thesis on the subject of “The Legal Protection of Private Individuals against Special Areas of Conservation”. He began his career as a lawyer in 2005, working initially for a major international law firm. He became a specialist in administrative law 2008 and joined ZENK in 2009. He has be...

Laura Zentner focuses her practice on the media and the technology sectors with an emphasis on copyright and entertainment law. Laura also advises national and international clients on large-scale outsourcing transactions, digitisation projects, cloud computing, software licensing as well as digital media. Her experience also includes the areas of development, production, funding, financing and distribution of films, TV programs and other audio-visual content. She advises on the structuring o...

Silvio Sittner is a partner at GÖRG Partnerschaft von Rechtsanwälten mbB and has been head of the real estate law Department since 2021. He advises national and international companies in the field of real estate law. He is primarily specialised in real estate transactions/project developments, commercial landlord and tenant law and land law (including complex neighbor agreements). Another focus is his work as a notary public. After studying law at the Humboldt University of Berlin,...

Roland Steinmeyer is a top attorney recognized by Best Lawyers in the practice area(s) of Corporate Law and Mergers and Acquisitions Law. Roland, who practices law in Berlin, Germany, has been recognized since 2009. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Roland is held by other top lawyers in the same geographic and legal practice area.