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Prof. Dr. Hannes Rösler, LL.M. (Harvard)

Welcome to the Chair of Civil Law, Private International Law, and Comparative Law.

© University of Siegen
Research

Invitation to the Lecture “The EU–Mercosur Agreement between Law and Geopolitics”

At the invitation of Prof. Rösler, Dr. Julio Pereira of Germany Trade & Invest will speak on November 18, 2026, about the EU–Mercosur Agreement between law and geopolitics.

Teaching

Winter Semester 2026/27: Seminar “International Business Law as Reflected in Case Law”

In the winter semester 2026/27, Prof. Rösler will offer the seminar “International Business Law as Reflected in Case Law” for bachelor’s and master’s students.

Teaching

Summer Semester 2026: Seminar “German, European, and International Labor Law”

In the summer semester 2026, Prof. Rösler will offer the seminar “German, European, and International Labor Law” for bachelor’s and master’s students.

Teaching

Winter Semester 2025/26: Seminar “International Business Law as Reflected in Case Law”

In the winter semester 2025/26, Prof. Rösler will offer the seminar “International Business Law as Reflected in Case Law” for bachelor’s and master’s students.

International

Visit to Partner Universities in Istanbul in May 2025

To deepen the cooperation with the partner universities, Prof. Rösler visited Istanbul in May 2025.

International

Responsibility for Erasmus+, Global Exchange, and Free Mover

Research

Dissertation by Dr. Ann-Christin Behrbohm on the Preliminary Question Published

Research

Festschrift Contribution on the International Nature of Choice-of-Court Agreements

In a new contribution to a Festschrift, Prof. Rösler analyzes the European Court of Justice’s recent Inkreal decision (Case C‑566/22).

Teaching

Summer Semester 2025: Seminar “International Business Law”

In the summer semester of 2025, Prof. Rösler will teach the seminar “International Business Law.”

German and European Business Law
at the University of Siegen

The best of both worlds:
Law and business administration, with a European focus.

Incoming Exchange Students

Courses taught in English, exams, and contacts for Erasmus and other exchange students.

Erasmus and Exchange Programs

Planning Your Stay

The International Office helps with application, housing, and arrival.

International Office

Degree Programs

Curriculum, admission, and application.

Bachelor’s (LL.B.) Master’s (LL.M.)

Watch the program video (YouTube, opens in a new tab)© University of Siegen

Theses and Seminar Papers

Prof. Rösler is happy to supervise your bachelor’s or master’s thesis. Please approach him directly or email him your request for supervision. You register for seminars in unisono.

For both theses and seminar papers, Prof. Rösler provides a detailed guide to writing academic papers. Its advice is deliberately detailed and is meant to help you write a convincing academic paper. The guide sets out clear assessment criteria and shows how to structure a paper sensibly, phrase it precisely, and cite correctly.

The ideal is a text that could be published as a journal article.

Supervision includes a thorough introduction to academic writing in international law and a meeting to discuss your outline. The whole process is designed to support you step by step in writing a paper that is academically sound and carefully worded. From choosing a topic and structuring the material to drafting the manuscript, clear guidelines and supervision meetings provide reliable orientation and encourage independent work of assured quality.

1

Supervision Request

Attach your CV and your transcript of records to your email request.

2

Choosing a Topic

Two to three weeks before you register your thesis, you develop a topic together with Prof. Rösler.

3

Outline Meeting

You discuss your outline with Prof. Rösler in a separate meeting. For theses, it takes place after about a quarter to a third of the writing period.

4

Oral Examination

After submission, you defend your paper in a free presentation, followed by a discussion of the subject and the announcement of your grade. For seminar papers, you receive your grade by email afterward.

Team

The team of Prof. Dr. Hannes Rösler, LL.M. (Harvard)

Contact and Directions

Postal address

Prof. Dr. Hannes Rösler, LL.M. (Harvard)
Universität Siegen
Fakultät III – Rechtswissenschaften
Campus Unteres Schloss
Kohlbettstraße 15
57072 Siegen
Germany

Visitor address

Prof. Rösler’s office (US‑F 216) is in the Ludwig-Wittgenstein-Haus, Kohlbettstraße 15.

Access is through building section D. The office is in building section F on the second floor (2. OG). For more details, see the campus map and our directions.

Secretariat

Hanna Siebel
Room US‑F 213

siebel@recht.uni-siegen.de

+49 271 740-3460

The Secretary’s Office is open Monday to Friday from 8:30 a.m. to 12:30 p.m.