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Dr Oliver Sieg

Work +49 211 49966 220

Work Department

Litigation, Arbitration & ADR, Insurance & Reinsurance


Oliver Sieg, based in Düsseldorf, is member and partner in Noerr's litigation, arbitration & ADR practice group and focuses on litigation at first instance and appeal courts, particularly in complex and cross-border disputes. He is experienced in representing parties in arbitration proceedings, especially according to DIS or ICC rules and ad hoc. He has also been appointed as arbitrator. Dr. Oliver Sieg is specifically committed to the education and formation of young lawyers and law students


Admitted in 1995; Joined Noerr in 2002.


Speaks German (native language), English and French.


DIS – German Institute for arbitration; VGR-Gesellschaftsrechtliche Vereinigung (Association for corporate law); Member of the Advisory Committee of the Research Centre for Insurance at the University of Münster; Expert and Legislative Committee for Insurance Law of the German Bar Association; Head of the regional Düsseldorf bar Committee for Insurance Law; Industrieclub Düsseldorf


Educated at the Universities of Bonn, Cologne, Cambridge (England), Speyer and Münster.

Germany: Dispute resolution

Commercial litigation

Within: Commercial litigation

Noerr’s team has ‘strong expertise’ in national and international litigation and the practice, which handles a wide range of work, is frequently instructed in insurance, banking and capital markets disputes. Oliver Sieg and his team, which is ‘strong in insurance disputes’, successfully represented, among others, the former CEO of Olympus Michael Woodford and his colleague Paul Hillmann in coverage litigation before the English High Court in connection with a German D&O insurance policy. The group is also involved in numerous proceedings for Deutsche Bank. Stefan Blum defended a company against a claim for damages. Michael Molitoris and Christine Volohonsky are other names to note and the firm’s newly opened office in Hamburg was strengthened by the addition of former White & Case LLP litigator Matthias Stupp; in addition, the group made up a number of new partners at the beginning of 2018.

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Germany: Insurance

Advice to insurers

Within: Advice to insurers

Noerr has corporate and insurance supervisory law work at its core and predominately advises D&O and E&O insurers, while also having expertise in liability and product design matters. The ‘highly solution-oriented and pragmatic’ team, which is jointly led by Oliver Sieg and Thomas Heitzer, recently assisted a German financial services provider with the set-up of a D&O insurance, and advised an international insurer on contractual and insurance supervisory law matters pertaining to the terms and conditions for a liability insurance product designed for the German market. Kai-Michael Hingst, who was previously at White & Case LLP, joined the team in April 2017.

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Insurance litigation

Within: Leading individuals

Oliver Sieg - Noerr

Within: Insurance litigation

The ‘pragmatic and solution-oriented’ team at Noerr is considered ‘one of the market leaders for D&O litigation’. Clients also value its ‘competent and specialised advice’ and regard its business model extension to also include insurance holders as ‘highly interesting’. Oliver Sieg advised a major German bank on matters regarding the defence of a fund company in a dispute including retrocessionaires against an investor before the High Court in London, and Thomas Heitzer acts for a large German insurance group in US and German D&O proceedings against an automotive group pertaining to falsified capital markets information. In other work, he advised an insurance group on coverage matters pertaining to a case for damages where a hospital concluded treatment contracts with foreign states for war victims.

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Legal Developments by:

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    On June 13, the Internet Corporation for Assigned Names and Numbers (ICANN) published the names of those who have applied for a new top level domain the ending of which may be geographic, such as "munich", industry identification such as "insurance" and even all trademark names and company descriptions such as "canon" and "adidas".
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