Alfred Siwy is a partner at our firm and an expert in national and international dispute resolution, with a strong focus on international arbitration and litigation.

Alfred regularly advises clients in commercial and investment arbitration under various rules, including the ICC, VIAC, UNCITRAL and ICSID Rules. Alfred also represents clients before Austrian courts in commercial and corporate matters. Alfred has acted as counsel in disputes across all industries, recently including in particular disputes involving competition law, consumer protection law and international investment law.

Alfred lectures on dispute resolution at international conferences and has authored numerous publications in his and adjacent fields. He was admitted to the Austrian bar in 2011 and as a solicitor in England and Wales in 2019. He is a graduate of the University of Vienna (Mag. iur. 2003, Dr. iur. 2011) and King’s College London (LL.M. 2006). Prior to co-founding in 2014, Alfred worked as a dispute resolution attorney for a major international Vienna-based law firm.

Alfred works in English (fluent) and German (native).

Highlights of Alfred’s work include the following:

  • Representation of a Lithuanian transport company in a debt collection case against an Austrian transport agency.

  • Representation of two subsidiaries of a global packaging and pager company in an arbitration proceeding against a Czech chemical supplier (EUR 2.4 million, VIAC).

  • Representation of a Central European state in an investment arbitration under the UNCITRAL Rules against a German natural person claiming violation of his/her rights by a court decision on squeeze-out (USD 100 million, PCA).

  • Representation of a global leader in packaging and paper in a post M&A dispute regarding the purchase of an Asian company ( EUR 70 million, ICC/Singapore).

  • Representation of an Eastern European state in an investment arbitration against a UK company in the health care sector (EUR 30 million, UNCITRAL).

  • Representation of a Southern European state in an investment arbitration against a Slovenian investor regarding the privatisation of a power plant (EUR 720 million, ICSID).

  • Representation of a major global oil & gas company in arbitral and court proceedings against a Western European gas pipeline operator regarding European competition law matters (EUR 70 million, ICC, Austrian energy regulator, Austrian Administrative Court).

  • Representation of an Eastern European state in an investment arbitration against a Dutch investor in the commodity trading sector (EUR 120 million, PCA).

  • Representation of a Southern European state in an investment arbitration against EGS regarding the privatisation of a power plant (EUR 72 million, ICSID).

  • Representation of a North American OEM-supplier in arbitration proceedings against Central European integrator in the aerospace industry (USD 11 million, VIAC).

Interested in specific aspects of Alfred’s recent work? Contact for further reference cases.

Professional Experience

  • Partner, Zeiler Floyd Zadkovich, Vienna/Austria (since 2020)
  • Partner,, Vienna/Austria (2014-2020)
  • Attorney/Associate, Schönherr, Vienna/Austria (2006-2014)
  • Associate, Hauser Partners, Vienna/Austria (2004)
  • Court Clerkship, Vienna/Austria (2003-2004)


  • Solicitor, England & Wales (2019)
  • Austrian Bar Exam, University of Vienna, Vienna/Austria (2011)
  • Doctor of Law (with distinction), University of Vienna, Vienna/Austria (2011)
  • LL.M. (with merit, scholarship of the Austrian Ministry of Science), King’s College London, London/UK (2006)
  • Certificate in International Arbitration, T.M.C. Asser Institute, Den Haag/Netherlands (2005)
  • Magister Iuris, University of Vienna, Vienna/Austria (2003)
  • Austria: Arbitration 2022
    "Alfred is very knowledgeable and sharp" "He is highly regarded for his leading arbitration skills" "It is a real pleasure working with him"

Best Lawyers 2022

  • Arbitration & Mediation 2022
  • Austria: Arbitrators and Counsel (2021)
    "One of the stars of the younger generation" "An experienced practitioner, in particular in investor-state disputes" "He is deeply knowledgeable and absolutely terrific" "A superb counsel"

Chambers Europe 2021

  • Dispute Resolution: Arbitration (Austria: Band 4)

Chambers Global 2021

  • Dispute Resolution: Arbitration (Austria: Band 4)
  • Next Generation Partner - Dispute Resolution: Arbitration and Mediation
    "Alfred Siwy with whom we work very frequently is an exceptional lawyer who has an ability to see the core of the dispute, his arguments are always very well thought through and structured. He is always on time and his advice is always very rational and practical. He knows how to present the case to the tribunal and has great advocacy skills."
  • Austria: Thought Leader in Arbitration 2020
    "Alfred Siwy "is identified as a "superb counsel" who is "easy to work with" and has "a sharp mind". His expertise lies in commercial and corporate disputes in the competition and consumer protection fields."
  • Next generation partner 2020

Chambers Global & Chambers Europe 2020

  • Dispute Resolution: Arbitration 2020 - Band 4
    "The 'impressive' Alfred Siwy is focused on cross-border investment arbitration, as well as handling competition-related claims. He acts for both multinational companies and government bodies."
  • "Alfred Siwy is a "highly experienced" counsel, praised for his "straightforward, pragmatic approach" to matters in the energy and healthcare sectors."

Chambers Global 2019

  • Up and Coming 2019
    "Entering the rankings this year, Alfred Siwy attains a significant level of market recognition for his investment arbitration practice."

LMG Expert Guides 2019

  • Recommended Expert: Commercial Arbitration 2019
  • "the recommended Alfred Siwy"
  • "The “excellent“ Alfred Siwy receives plaudits for his “sharp intellect“ and extensive experience acting as counsel in international commercial and investment arbitration."
  • Who's Who Legal 2017
    "Alfred Siwy is described as a “star performer” by our sources, the quality of Alfred Siwy’s work and firm is widely recognised."

GAR 9th edition

  • "Alfred Siwy impressed us with his hands-on approach and extensive knowledge of public international law."

JUVE 2022

  • Disputes for Tea | Litigation

    Disputes for Tea | Litigation

    “US Class Action and European Representative Actions”

    US Class Actions are a feature of US litigation, which is well-known and sometime misconceived far beyond the United States. The member states of the European Union will introduce representative actions for the protection of collective interests of consumers by 25 December 2022 under Directive 2020/1828.

    Join us on 9 December 2021 for a discussion on the principles of class actions and whether or not they could serve as a model for representative actions in the EU with class action focused attorney Mike Lowenberg and our Vienna partner Alfred Siwy moderated by our New York/Houston of counsel Nicholas Paine.

    Thursday, 9 December 2021, 8:30 EST / 14:30 CET

  • New Legal 500 EMEA 2021 Rankings!

    New Legal 500 EMEA 2021 Rankings!

    We are proud to be ranked by the Legal 500 once again for our work in Arbitration and in Employment!

  • New Chambers Europe 2021 Recognitions!

    New Chambers Europe 2021 Recognitions!

    We are delighted to have all of our Vienna partners ranked in the 2021 edition of Chambers Europe!

  • New Chambers Global 2021 Rankings!

    New Chambers Global 2021 Rankings!

    We’d like to thank all of our wonderful colleagues and clients who recommended us both as a firm and as individuals to be included in the Chambers and Partners Global 2021 Guide.

  • 2021: Who’s Who Legal

    2021: Who’s Who Legal

    We are exicted to have been recognized by Who’s Who Legal 2021!