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, SCCA, 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, Greek, Italian, and Russian. We provide the best value for world-class arbitration legal representation, tenaciously resolving every dispute in alignment with our clients’ 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.
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.
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.
Daria Korniienko
Daria Korniienko is a Ukrainian national with an LLM in Comparative and International Dispute Resolution from Queen Mary University of London and an LLB in International Law from the Kyiv University of Law at the National Academy of Sciences of Ukraine. She also pursued legal studies in Heidelberg, Germany, and Lausanne, Switzerland. During her academic career, she participated in several moot court competitions, including the International Human Rights Law Moot at the University of Lausanne, and later served as an arbitrator at the APAC-BICAM Vis Pre-Moot 2025. Daria is fluent in Ukrainian, Russian, English, and German, and has working proficiency in French and Spanish. Prior to joining Aceris Law, she gained diverse international legal experience, most recently supporting Malaysian arbitrator Datuk Professor Sundra Rajoo as an Academic Researcher and contributor to his forthcoming publication. Her previous roles include serving as an Independent Legal Consultant for the pharmaceutical company SONA-Pharm OÜ and as a Legal Officer at the Ministry of Foreign Affairs of Ukraine. She also completed internships with Pridatect’s data protection legal team, Merck KGaA, and UNHCR, and contributed to the official Ukrainian translation of the UNIDROIT Principles of International Commercial Contracts as an accredited translator.
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.
Sidney Larsen
Sidney Larsen is a Paris-based, New York-qualified international arbitration attorney and an Associate at Aceris Law. Sidney holds a J.D. from American University Washington College of Law, where she graduated summa cum laude, and a master’s degree in law from 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, LMAA, 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.
Justine Codo
Justine Codo completed her law studies with a focus on international litigation and international arbitration. She holds a Master’s degree in Economic Cooperation and International Business Law, co-directed by the Toulouse University Capitole and the Vietnam National University, where she wrote a thesis on combating transnational corruption through international arbitration. During her Bachelor’s degree studies, Justine spent a year at the University of Quebec in Montreal, deepening her knowledge of international public and international economic law. She also obtained a University Diploma in French and international arbitration. Currently attending the Paris Bar School, she is awaiting admission to the French Bar. Before joining Aceris Law, Justine was a trainee at an international law firm specializing in the representation of sovereign States in international arbitration, gaining experience in the ICSID, ICC, and UNCITRAL arbitration rules. She has also contributed to annulment proceedings before the Paris Court of Appeal. During her previous internships at renowned French law firms and a multinational company, she developed a solid understanding of the energy, banking, construction, and distribution sectors. She is fluent in French and English, has intermediate proficiency in Spanish, and has basic knowledge of Vietnamese.
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.
