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Portrait ofDaniela Karollus-Bruner

Daniela Karollus-Bruner


CMS Reich-Rohrwig Hainz
Rechtsanwälte GmbH
Gauermanngasse 2
1010 Vienna
Languages German, English, Italian, French

Daniela Karollus-Bruner is a partner at CMS Reich-Rohrwig Hainz and leads the dispute resolution group. She is the co-head of the CMS International Arbitration Group and a member of the Board of the International Association of Defense Counsel (IADC).

Daniela has many years of experience with highly complex litigation and arbitration cases for clients from various industries, with a special focus on banking and financial services, automotive, construction, consumer products and insurance industries. She represents Austrian and international clients at courts and at arbitration courts with a focus on cases involving damages, contracts, product liability, corporate and competition law.

In addition, she is a member of our teams for corporate and commercial law. She advises clients on commercial matters such as contracts, general terms and conditions, warranties and damages including liability.

During and after law school in Vienna and Paris, she held assistant positions with the University of Vienna Law School (e.g. at the Department of Civil Law). Daniela Karollus-Bruner has over 25 years of experience as a lawyer.

In addition, she is a speaker at executive seminars as well as author and co-author of various expert articles.

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‘We work with Daniela Karollus-Bruner and Sonja Otenhajmer, their work is fast and diligent.’

The Legal 500 EMEA, 2024

"Daniela is excellent, she is a tough cookie."

Chambers Europe, 2024

"She has a great ability to understand complicated technical matters."

Chambers Europe, 2023

"She has amazing negotiation skills."

Chambers Europe, 2024

„In litigation, it was a joy to see her cross-examine.“

Client feedback, Chambers Global 2024

"Daniela Karollus-Bruner operates a well-established litigation practice, advising clients on a range of complex disputes, including construction and payment-related conflicts as well as damage claims. 'Ms Karollus-Bruner does a very fine job,' a source remarks."

Chambers & Partners, 2022

Memberships & Roles

  • Austrian Bar Association
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Awards & Rankings

  • The German business newspaper Handelsblatt ranks Daniela Karollus-Bruner as one of the best lawyers in the fields of European law, conflict resolution and arbitration/dispute resolution/mediation (Best Lawyers Ranking 2020).
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  • 1990 - Mag. iur., Law, University of Vienna 
  • 1987 - Panthéon-Assas, Université de Paris II
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Apleona acquires Siemens Ge­bäu­de­m­an­age­ment und -Services (SGS). CMS Vienna provides comprehensive legal support to Siemens Aus­tria.   Siemens Austria has agreed to sell Siemens Ge­bäu­de­m­an­age­ment & -Services G.m.b.H. (SGS) to Apleona. The closing of the transaction is expected in the third quarter of the financial year and is subject to customary antitrust approvals. Both companies have maintained a good and close relationship for years. SGS will be further strengthened by joining forces with Apleona, resulting in an expanded and improved range of ser­vices.   Siemens Austria is being legally advised and supported by the Viennese law firm CMS Reich-Rohrwig Hainz under the leadership of Alexander Rakosi, partner in the Corporate/M&A department. The core CMS team further consists of M&A experts Florian Mayer, Marie-Christine Lidl, Anna Hiegelsperger and Matthias Emich. Sibylle Novak and Alexander Hiermann deal with tax law issues, Andrea Potz, and Jens Winter assist on labour law topics and Bernt Elsner and Marlene Wim­mer-Nistel­ber­ger advise on competition law. Additional support during the course of the transaction came from Daniela Karollus-Bruner, Robert Keisler, Dieter Zandler and Clemens Gross­may­er.   Al­ex­an­der Rakosi is pleased with the successful deal signing: “We are proud to be able to support Siemens on this project with a cross-de­part­ment­al team and contribute to further entrenching Siemens as a focused technology company in Aus­tria.”   Siemens Ge­bäu­de­m­an­age­ment & -Services ¬G.m.b.H., based in Vienna, is a successful man­u­fac­turer-in­de­pend­ent full-service provider in the technical building¬ management¬ sector with around 260 employees. Its customers include institutions from the health care, culture and education, trade and logistics sectors, as well as renowned commercial enterprises. In the last business year, it achieved a turnover of around 75 million euros.
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