Aceris Law > Geneva, Switzerland > Firm Profile

Aceris Law

Aceris Law is a leading boutique international arbitration law firm. It provides the highest-quality legal representation for complex international commercial arbitrations, investor-State arbitrations and international construction disputes, combining competitive legal fees with an outstanding track record. It covers all jurisdictions, arbitral institutions and industry sectors, working in diverse languages for clients throughout the globe.

With Harvard, Columbia and Sorbonne-educated lawyers admitted to bars of Western Europe, North America, Eastern Europe and South America, and nearly two decades of experience focusing on international arbitration law and procedure at the highest level, as well as international mediation and the enforcement of arbitral awards, Aceris Law combines excellence, rigor, experience and an outstanding track record with unbeatable value for high-quality international arbitration legal representation in order to offer exceptional value to its clients.

Aceris Law provides arbitration legal representation under nearly all laws. It has previously provided legal representation in arbitrations under English law, French law, Swiss law, multiple American laws, various Australian laws, various Canadian laws, Spanish law, Singapore law, Hong Kong law, Saudi Arabian law, UAE law, Kuwaiti law, Brazilian law, Russian law, Serbian law, the laws of Bosnian and Herzegovina, Georgian law, Turkish law, Mexican law, German law, Japanese law, Uzbek law, Turkish law, Angolan law, OHADA law, South African law, Malaysian law, Moldovan law, Albanian law, Argentine law, Romanian law, Kenyan law, Liberian law, Nigerian law, Swedish law, Tunisian law, Moroccan law, Mauritanian law, Hungarian law, public international law, and the laws of many other common law and civil law jurisdictions, winning or settling the vast majority of disputes.

Partner William
Senior Associate Nina
Senior Associate Zuzana
Associate Anne-Sophie
Associate Anastasia
Associate Isabela Monnerat
Office manager Mouna
Nina Jankovic photoMs Nina JankovicAssociate at Aceris Law LLC As an international arbitration lawyer with considerable…
William Kirtley photoMr William KirtleyPartner at Aceris Law LLC The international arbitration lawyer William Kirtley, principal…
Zuzana Vysudilova photoMs Zuzana VysudilovaAssociate at Aceris Law LLC Zuzana, a Slovak native, is a French-educated…
All Staff : 9
All main business languages
ABA (American Bar Association)
IBA (International Bar Association)
IAI Paris (International Arbitration Institute)
ASA below 40
ICC France
Dubai International Arbitration Centre (DIAC)
Contact Information :
Telephone : +41 22 819 18 12
Website :


COMPANY/FIRM: CEO of Book Publishing Company

TESTIMONIAL: Hands down the best team of lawyers you could have in your corner. With Aceris Law you are guaranteed to receive the best legal representation in the field of international arbitration for very reasonable legal fees.


COMPANY/FIRM: CEO of Gas Processing Company

TESTIMONIAL: From the bottom of my heart, I wish to thank you and convey to you my most sincere appreciation for the diligent and professional work [of Aceris]. I have worked with lawyers for 20 years and you have helped to bring back my faith in lawyers.


COMPANY/FIRM: CEO of Upeco Trading A.G.

TESTIMONIAL: I highly recommend [William Kirtley and Aceris] for international arbitration legal counsel. He is an excellent practitioner and a top-notch professional. He is highly reliable and will never give up on a client’s case. He is very experienced as legal counsel and a very good person as well. He can see all details which could be decisive in the arbitration. His goal is to bring meritorious cases to victory, and he does the best of it. I recommend him as a professional and a person who never abandons a case halfway, no matter how hard a case can be.

CLIENT: C.P. and D.L

COMPANY/FIRM: Owners and Directors of Communication and Technology Solutions Company

TESTIMONIAL: Aceris’ lawyers are friendly and professional, their legal drafting is excellent, their legal fees were reasonable, their strategy was successful, and we highly recommend Aceris Law for international disputes that are capable of resolution through arbitration, which is their specialty. Although they are based in Europe, the dispute was in California and our company is located in the Philippines, the time zones posed no practical constraints since they are well-equipped with the latest technology and available around the clock by videoconference.


COMPANY/FIRM: Director at Oxfirst Ltd. & Fellow at Said Business School, University of Oxford

TESTIMONIAL: Aceris team did not count his time to assure our business went from success to success. As an attorney, William Kirtley is reliable, dynamic, loyal and committed. I can recommend William to any firm who is looking for an attorney who will seek 100% to guard the interests of his client.