Sotiris is a dynamic advocate and one of the leading commercial arbitration specialists in Greece. He has handled numerous significant arbitrations under ICC, LCIA, SCC, Swiss, UNICITRAL and domestic rules across a variety of sectors and markets. He is one of Lambadarios’s expert counsels and an influential force at the very top of the firm.

Having specialised early in his career, Sotiris has rapidly established a reputation for insightful and expert counsel during high-value and commercially sensitive disputes and is one of the youngest-ever lawyers to be appointed by the ICC as an arbitrator. He has handled cases on a wide range of disputes across many sectors, including concessions within the construction industry, energy projects, shareholder disputes, and disputes relating to the hotel and leisure sectors as well as to the Greek defence sector.

Sotiris’s experience both as counsel in all forms of alternative dispute resolution and as arbitrator enhances the firm’s capabilities in structuring, managing and presenting dispute cases, and also in pre-litigation and pre-arbitration assessments. His practice at Lambadarios focuses on arbitration and commercial dispute resolution, civil law disputes, anti-trust private damages actions, and disputes around the issue of data protection and privacy.

Areas of expertise

Sotiris is a widely respected arbitration counsel and arbitrator and one of the youngest-ever lawyers to be appointed as arbitrator by the ICC. He has represented clients as counsel in arbitrations under ICC, LCIA, SCC, Swiss, UNCITRAL and domestic rules, and in arbitration-related proceedings including setting aside and recognition and enforcement of arbitral awards). He has also represented the European Commission as external legal counsel before the Courts of the European Union.

His experience in commercial arbitration spans engineering, energy, construction, concessions, mining, commodities, anti-trust and state aid, privacy and shareholder disputes as well as disputes arising from main and offset agreements in the defence sector.

He has represented clients in proceedings before the Greek courts, including Courts of Appeal and the Supreme Court. As well as providing expert counsel in arbitrations and other forms of ADR, Sotiris has served as administrative secretary to several arbitral tribunals.

Sotiris also supports clients with pre-arbitration assessments and settlement negotiations, helping them to understand their best options and weigh up the possible outcomes in advance of potentially costly and disruptive proceedings.

He is member of several arbitration-related commissions and task forces and sits on the advisory board of EODID, the Athens Mediation & Arbitration Organization alternative dispute resolution services provider.

Sotiris advises a wide range of clients on contract negotiations in public and private sector tenders, including concessions within the construction industry, privatisations, infrastructure projects, and EPC contracts.

Sotiris provides expert advice on a wide range of matters relating to Greek and EU regulation, in particular regarding data protection and information privacy, anti-trust and merger control, and casino and gaming regulation.

He is a Certified Information Privacy Professional for Europe (CIPP/E) and has acted as Data Protection Officer appointed by several entities in the energy, retail, wholesale and gaming industries.

Related News & Events

We are pleased to announce that partners Sotiris Dempegiotis & Georgios Panopoulos are contributors to Lexology GTDT


ARBITRATION IN GREECE: Investors targeted with English language clauses


Lambadarios Law Firm is delighted to announce that Sotiris Dempegiotis, is joining as partner in its Arbitration & Dispute Resolution practice

  • Advocate of the Greek Supreme Courts (2018)
  • Athens Bar Association (2008)
  • Member of the International Chamber of Commerce, Greece
  • Member of the International Arbitration Committee of ICC Greece (‘ICC Hellas’)
  • Member of the ICC Commission on Arbitration and ADR
  • Member of the ICC Task Force “Addressing Issues of Corruption in International Arbitration”
  • Advisory committee of the EODID
  • Greek
  • English
  • LLB University of Athens, 2005
  • LLM University of London, School of International Arbitration, 2007
  • PhD International Commercial Arbitration, University of Athens, Faculty of Law, 2015

Sotiris has published extensively on matters relating to arbitration law and is a regular speaker in arbitration-related seminars and conferences.

He is the author of International Commercial Arbitration and Competition Law, NOMIKI BIBLIOTHIKI, 2016 [in Greek] and has written numerous articles and commentaries including:

  • Comment on CJEU’s judgment in case C-284/2016 Slovak Republic v. Achmea BV, Business and Company Law, 2018, pp. 624-634 [in Greek].
  • Arbitration clauses and tort claims for breach of anti-trust rules, 118 Counsel (Sinigoros), 2016, pp. 30-32 [in Greek].
  • Arbitration as a dispute resolution mechanism in the energy sector, 25 Energy and Law, 2016, pp. 49-57 [in Greek].
  • EC competition law and international arbitration, Global Antitrust Review, 2008, pp. 135-148.
  • EC competition law and International Arbitration in the light of EC Regulation 1/2003, 25(3) Journal of International Arbitration, 2008, pp. 365-395.

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