Oliver Sieg

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

Born in 1972 Legal studies at Bielefeld University First Exam ("1. Staatsexamen") in 1998 Doctoral research a Friedrich-Naumann-Stiftung Fellow Research associate under Prof. Dr. Oehler (Chair for Commercial and Business Law, as well as Comparative Law) at Bielefeld University Legal clerkship ("Referendariat") at the Bielefeld District Court Second (Bar) Exam ("2. Staatsexamen") in 2001 Bar admission in 2002, and with the firm since then Doctor of Laws (Dr. jur.) 2003 Certified Specialized At...

Sabine Dethof is a patent litigator and Salaried Partner at HEUKING, Düsseldorf. As a Certified Specialist Lawyer in Intellectual Property Law with 14 years of professional practice, she has a wide range of experience, in particular in the field of mechanical engineering and in the areas of automotive, semiconductors and medical devices. Besides the daily business of patent infringement proceedings she is especially experienced in nullity proceedings before the Federal Patent Court. For ...

Born in 1970 Legal studies at Bielefeld University First Exam ("1. Staatsexamen") in 1995 Doctoral studies as a Friedrich-Naumann-Stiftung fellow, dissertation on "Kapitalsicherung und Gläubigeranfechtung" (capital protection and creditor appeals) under Prof. Dr. Schön as doctoral advisor Legal clerkship ("Referendariat") at the Bielefeld District Court Second (Bar) Exam ("2. Staatsexamen") in 1998 With the firm since 1999 Doctor of Laws (Dr. jur.) 2001 Certified Specialized Attorne...

Dr. Ute Jasper has been a lawyer at Heuking Kühn Lüer Wojtek since 1991 and a Partner since 1994. Dr. Jasper heads the Public Sector Department. With the department, she has designed and implemented numerous projects for the government as well as for large cities, counties and municipalities, such as large procurement procedures and investor competitions, but also strategic partnerships and PPPs in the fields of public transport, culture, sports, water, energy, construction, hospita...

Kaan Gürer is a top attorney recognized by Best Lawyers in the practice area(s) of Competition / Antitrust Law, European Union Law and Litigation. Kaan, who practices law in Düsseldorf, Germany, has been recognized since 2021. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Kaan is held by other top lawyers in the same geographic and legal practice area.

Gabi Müllejans LL.M. oec. is a lawyer and local partner at Friedrich Graf von Westphalen & Partner. Since 2024, she has been working in the intellectual property and trademark and design law practice of Friedrich Graf von Westphalen & Partner’s Cologne office. She has many years of working experience as a trademark and competition lawyer at leading, internationally oriented law firms. She worked as a lawyer specializing intellectual property law at a renowned IP boutique in...

Christoph Janssen is a top attorney recognized by Best Lawyers in the practice area(s) of Restructuring and Insolvency Law. Christoph, who practices law in Cologne, Germany, has been recognized since 2021. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Christoph is held by other top lawyers in the same geographic and legal practice area.

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

Jens Ortmanns is a top attorney recognized by Best Lawyers in the practice area(s) of Corporate Law, Private Equity Law and Real Estate Law. Jens, who practices law in Düsseldorf, Germany, has been recognized since 2017. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Jens is held by other top lawyers in the same geographic and legal practice area.