Our award-winning international arbitration lawyers have provided legal representation in over 200 international commercial, construction and investor-State arbitrations under the ICC, ICSID, UNCITRAL, LCIA, ICDR, SIAC, SCC, DIAC, HKIAC, JAMS, Swiss Rules, AAA, LCAM, LMAA, CICA, MIAC, OHADA and other arbitration rules. We provide legal representation for international arbitrations under nearly all laws and have accrued an exceptional record of successes for past clients. All of our arbitration lawyers speak English and French fluently, while our team also speaks other languages, including Spanish, German, Arabic, Serbo-Croat, Czech, Slovak, Greek, Polish, Italian and Russian. We provide the best value for the highest-quality arbitration legal representation globally, while tenaciously resolving every dispute in line with our client’s interests.
William Kirtley
William Kirtley, Managing Partner of Aceris Law, is a Franco-American Harvard-, Columbia- and Sorbonne-educated international arbitration lawyer with over two decades of experience focusing on international commercial, investment and construction arbitration at the highest level. He has served as counsel or arbitrator in some of the largest arbitrations in history. He is a member of the New York and Washington, DC Bars and an inactive French Avocat à la Cour, who was previously a member of the international arbitration practice groups of Shearman & Sterling (now A&O Shearman) and Salans (now Dentons). He has served as lead counsel in disputes on five continents, under the ICC, ICSID, UNCITRAL, LCIA, SCC, ICDR, SIAC, HKIAC, DIAC, CICA, LCAM, JAMS, DIFC-LCIA, AAA, AFA, Swiss Rules and other arbitration rules, winning or amicably resolving nearly all of the numerous disputes where he has served as counsel. Recognized by the Legal 500 and Décideurs for many years, named as the “Best of the Best” in various legal awards, as well as “Who’s Who” in the field of international arbitration, clients call him a “great international arbitration lawyer” who is “incredibly smart“, “reliable, dynamic, loyal and committed to his clients“, “fair and transparent” and “a lawyer who will seek one hundred percent to guard the interests of his client“. They also call him “hard-working and highly responsive” with “depth of knowledge and experience in international dispute resolution” and “an unstoppable work ethic“. They also cite his “excellent understanding of international arbitration case law and strategy” while noting that he is “very easy and pleasant to work with” and he “never abandons a case halfway, no matter how hard a case can be“. He also serves as arbitrator under a variety of arbitration rules and is directly involved in all work of Aceris Law LLC.
Zuzana Vysudilova
Zuzana, Senior Associate at Aceris Law, is a Sorbonne/Assas-educated lawyer registered at the Paris Bar with a decade of experience in international investment, commercial and construction arbitration. Zuzana has served as counsel in high-profile arbitrations under the ICSID, ICC, SIAC, UNCITRAL, SCC, LCIA, PCA and other arbitration rules. She has represented companies and States in disputes across a broad range of industries (real estate, construction, energy, oil & gas, civil aviation, cryptocurrency, waste management, etc.) under French, Swiss, English, Georgian, Kazakh, Saudi, OHADA and other laws. Zuzana has served as counsel for an Eastern European State-owned company in Dispute Adjudication Board proceedings against an Indian construction company concerning a dispute over the construction of an OHL transmission line; for a publicly-listed company in an SCC arbitration against a Dubai-based company in a dispute regarding a logistics contract involving, inter alia, issues of the application of U.S. economic sanctions through the prism of force majeure; for a Singapore-based company in a successful ICC arbitration against a French company over a civil aviation dispute; for a Northern-African State-owned company in an ICC arbitration against multiple companies over a dispute relating to the construction of a cement plant; and for a Dubai-based company in a successful SIAC arbitration against an Indian company over a dispute relating to shipping of styrene monomer. Prior to joining Aceris Law, she represented Mr. Ibrahim Aboukhalil in a successful multi-million-dollar UNCITRAL ad hoc investment arbitration against the Republic of Senegal. She has represented a Caymanian company in a LCIA arbitration against a Romanian company in a dispute over a drilling project in the Black Sea; a British investor in an ICSID case against Hungary (ICSID Case No. ARB/21/66) and an Ivorian company de facto controlled by Danish and Ivorian companies against the Republic of Côte d’Ivoire in ICSID Case No. ARB/24/47. Zuzana is originally from Slovakia, speaks English, French, Slovak and Czech fluently and has basic knowledge of Russian.
Alexandra Koliakou
Alexandra Koliakou, Associate at Aceris Law, of French and Greek nationality, is admitted to the Paris Bar. She speaks fluent French, English and Greek and has a working knowledge of Spanish. She completed her studies in France and the United Kingdom. She obtained her law degree and Master’s Degree from the Universities of Paris II Panthéon-Assas and Paris V Descartes. Subsequently, she focused on international dispute resolution and graduated with distinction from the LLM Program of Comparative and International Dispute Resolution at the Queen Mary University of London. Prior to joining Aceris Law, Alexandra worked in various French and international law firms, including Teynier Pic, a boutique firm specialized in international dispute resolution, and at the international arbitration department of Willkie Farr & Gallagher in Paris. Alexandra has experience in commercial (post-M&A, aerospace, intellectual property), investment and construction disputes under the ICC Rules (including ICC emergency arbitration proceedings), ICSID and UNCITRAL Rules involving French, Montenegrin, Indonesian and English law.
Haider Ali
Haider Ali studied law in Paris and New York. Haider holds a Bachelor in Law and a Master’s Degree in International Law from Université Paris II Panthéon-Assas, where he participated in various International Law moot courts and provided pro-bono services to various NGOs. He was selected by Paris II Panthéon-Assas for a merit-based full scholarship to complete an LL.M. in International Business & Trade Law at Fordham University School of Law. Haider went on to earn an additional Master’s degree in International Business Law from Université Paris-Saclay. He is now seeking admission to the New York and Paris bar. Haider speaks French, English, Spanish, Urdu, Hindi and Russian, among others. Over the course of his training, Haider gained significant experience in both civil and common law jurisdictions, in addition to several arbitration rules. Haider specialises in arbitration and was extensively trained in commercial and investor-State arbitration by leading specialists, including arbitrators, professors and lawyers. Haider gained significant experience at a Parisian firm prior to joining Aceris Law.
Maritina Leontiou
Maritina Leontiou studied law at the National and Kapodistrian University of Athens. She has also studied as an exchange student at Université d’Orléans in France. Maritina gained valuable experience in international commercial arbitration by participating in the 29th Willem C. Vis Moot Court as a counsel, working on the CISG, UNIDROIT, and AIAC Rules. She has also deepened her knowledge of international arbitration by working as an intern in organizations such as the “Paris Arbitration Week,” where she covered events by providing briefings in both English and French, and “The Arbitration Digest,” where she worked on commenting on international arbitration cases, conducting research, and writing articles. Additionally, she has worked on projects for the United Nations as a fundraising manager for a Sports Organization in Bolivia and participated in two model Greek Parliaments. Maritina speaks English, French, and Greek.
Marta Milanovic
Marta Milanovic holds a Master’s degree in International Law, Foreign Trade and International Relations from ISDE in Spain, a law degree from the University of Belgrade, Serbia, and a degree in Finance and Banking from the Belgrade Banking Academy in Serbia. Of Serbian origin, Marta speaks English, Serbian, Croatian and Spanish fluently, and she has a working knowledge of French and German. During her studies, she also completed a Business Negotiations program at New York University in the United States. Prior to joining Aceris Law, Marta was a trainee at a boutique law firm in Barcelona. Marta has experience in commercial, investment and construction disputes under the ICC and SIAC Rules involving Swiss, Montenegrin, Indonesian, Singapore and Seychelles law.
Nina Jankovic
Nina Jankovic, Senior Associate at Aceris Law, holds an LLM in Public International Law from Leiden University, the Netherlands, and an LLB from Belgrade University, Serbia, graduating summa cum laude. She has a decade of experience in international construction, investment and commercial arbitration. Prior to joining Aceris, Nina was a Graduate Trainee in the International Arbitration Group of Freshfields Bruckhaus Deringer in Paris and a former intern at the Permanent Court of Arbitration (PCA) in The Hague. Nina has served as counsel in numerous arbitrations under the UNCITRAL, SIAC, SCC, ICC, LCIA, PCA, AAA, ICDR and other arbitration rules, involving English, Swiss, Bosnian, Saudi, Omani, Qatari, Uzbek, Angolan, Singapore, Montenegrin and other laws. Recent cases, concluded successfully in favor of Aceris Law’s clients, include, inter alia, an LCIA arbitration under Saudi law regarding the construction of a desalination plant in the Middle East; an UNCITRAL ad hoc arbitration involving the construction of a water distribution network in Angola; and a SIAC arbitration under Singapore law regarding the construction of a desalination plant in Oman. She has also represented a publicly listed Malaysian company in a USD 400 million dispute involving a natural gas construction project in Uzbekistan against a subsidiary of a Russian multinational company in the oil and gas sector, as well as a Greek construction company in an UNCITRAL arbitration administered by the PCA against a Bosnian state agency involving the construction of a wastewater treatment plant governed by Bosnian law. Nina has represented a French magnate, investor and high-net-worth individual, Mr. Bachar Kiwan, in a USD 800 million ICSID arbitration against Kuwait (Bachar Kiwan v. State of Kuwait, ICSID Case No. ARB/20/53). Clients praise her as a “very well organized”, a “methodical researcher” with “a very sharp intellect”, “cutting through unnecessary information with excellent drafting ability to present the case succinctly”. They also find her very “friendly and professional”, “easily approachable and very responsive”. Nina speaks English, Serbian/Croatian, Spanish, German, French and Italian fluently, and she has basic knowledge of Portuguese. She is qualified to practice law in Serbia.
Anastasia Tzevelekou
Anastasia Tzevelekou is a London-based international arbitration lawyer, triple-qualified in England and Wales, Ireland and Greece, with broad expertise in both civil and common law systems around the globe. Anastasia has served as counsel in LCIA arbitrations under English law, notably in the steel and energy sectors. She has also served as counsel in construction disputes, including dispute board proceedings in the electricity industry. In addition, Anastasia has served as counsel in an SCC arbitration regarding a logistics contract, multiple ICC arbitrations under American law, Saudi law, Swiss law and other laws, on behalf of multinational corporations in the cryptocurrency, distribution, automotive and other sectors. She has also advised a European third-party funder on the potential acquisition of a large arbitral award against an African State and enforcement issues involving sovereigns. She has also represented a Saudi company in an LCIA arbitration under English law involving lost profits in the commodities sector. She has also served as counsel in two ICC disputes under Swiss and African laws in the technology and pharmaceutical industries and assisted an arbitrator in a DIFC-LCIA arbitration concerning an EPC contract. Anastasia holds an LL.M. in International Business Law from the London School of Economics, as well as an LL.M. in International Commercial Arbitration and a Bachelor’s Degree in Law, both from the Democritus University of Thrace in Greece, graduating in the top 1% of her class. Prior to joining Aceris, Anastasia worked at KPV Legal, a boutique firm in Athens, assisting with international arbitration cases and advising corporations in the aviation, pharmaceutical, distribution, energy and other sectors. Anastasia speaks English, French and Greek.
Bartosz Wygladala
Bartosz Wygladala, Associate at Aceris Law, is a Polish lawyer, admitted as Attorney and Counsellor at Law in New York. He graduated with an LL.B. from Brunel University London, with an LL.M. from the University of Manchester, and with an LL.M. in International Dispute Settlement from the University of Geneva and the Graduate Institute of International and Development Studies. In 2019 Bartosz took part in the Austrian Arbitration Academy organised by the University of Vienna. Bartosz gained his experience in international dispute settlement by working at Vavrovsky Heine Marth Rechtsanwälte in Vienna and Wilmer Cutler Pickering Hale and Dorr in London. He has experience in construction, mining, aviation, franchising, post-M&A, and investment arbitrations under the ICC, VIAC, HKIAC, AAA, DIS and Swiss rules, seated in London, Vienna, Paris, Geneva, Philadelphia, New York, and Hong Kong and Kuwait. Bartosz represented a British investor in an ICSID dispute against Hungary. Bartosz also represented an Omani company in an ICC construction dispute seated in London. Bartosz has experience with both common law and civil law disputes. Trained in English law, Bartosz has experience with disputes under English, Austrian, Swiss, French, US, Swedish, Qatari and Hong Kong laws. Bartosz has experience in working with legal and technical experts in preparation of their expert reports. Bartosz speaks English, French, Polish and Italian and has a working knowledge of German and Spanish.
Sidney Larsen
Sidney Larsen has studied law in both the United States at the American University Washington College of Law and in France at the Université Paris Nanterre. She also earned a master’s degree in international peace and conflict resolution from American University and a bachelor’s degree in French from Luther College. Sidney began her career in international dispute resolution as an intern with the Managing Counsel at the ICC’s International Court of Arbitration in Paris, France, before becoming a Trainee at Aceris Law. She has experience in commercial, investment, and construction disputes under the ICC, ICSID, UNCITRAL and SIAC arbitration rules and both common law and civil law systems and the CISG. Additionally, she has completed internships with various departments of the United States Government, including the Department of Defense (Military Commissions Defense Organization), the Department of Justice (National Courts Section), and the Department of Homeland Security (Human Rights Violator Law Division). Of American origin, Sidney is a native English speaker and proficient in French.
Michael Hodgson
Michael Hodgson graduated from the University of Sussex with a 1st class law degree in the summer of 2024. He has also undertaken a placement year at the University of Michigan where he studied political science. At Michigan, Michael received a James B. Angell award and became an advocate for UNICEF U of M. During his studies, he has acquired significant experience with the laws of numerous jurisdictions, including Singapore and the United Kingdom. He is qualified to teach Westlaw advanced certification and was an intern at a leading litigation firm in London. In addition, he has worked on projects for the United Nations’ Food and Agriculture Organisation. Michael is originally from Belgium and is fluent in English and French and also speaks Russian.
Mouna Baakil
Mouna Baakil is Aceris Law’s Office Manager. Mouna holds a Master II in International Commerce and Management obtained at ESCI Paris and studied law in London at The London Metropolitan University. Prior to joining Aceris, Mouna worked at PWC Morocco. She also worked as marketing and communication manager for a VOIP company based in Casablanca with several branches in France, India and Lebanon. She further served as business manager at Brasserie Kronenbourg of the Carlsberg Group and was a marketing assistant at Cooper Power Tools France. She is Moroccan of origin and speaks fluent French, English and Arabic. Mouna may be contacted regarding traineeships, marketing, billing or operational issues and is always available to answer any questions regarding Aceris Law.
